13-letter words starting with B

13-letter words starting with B number 431, including familiar terms, specialist vocabulary, and words scoring 36 points.

431 wordsTop pick BREASTFEEDINGHighest score BENZIMIDAZOLE 36

3 of 431 are everyday words (1%). Mostly rare words: great for Scrabble, tough for daily puzzles.

Letter
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z

P starts the most 13-letter words (1,597); Y starts the fewest (10). B ranks #15 of 26. The bar under each letter shows the size of its list.

Length
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Best words to play first 431 · most-used first

BREASTFEEDING₂₀
BENEFICIARIES₂₀
BIOTECHNOLOGY₂₄
BREAKTHROUGHS₂₆
BUSINESSWOMAN₂₀
BRAINSTORMING₁₈
BACCALAUREATE₁₉
BIODEGRADABLE₂₀
BIBLIOGRAPHIC₂₅
BATTLEGROUNDS₁₇
BIDIRECTIONAL₁₈
BUREAUCRACIES₁₉
BIOMECHANICAL₂₄
BIOSTATISTICS₁₇
BROKENHEARTED₂₃
BUSINESSWOMEN₂₀
BLACKSMITHING₂₇
BOOTSTRAPPING₂₀
BEATIFICATION₂₀
BUPRENORPHINE₂₂
BACTERIOPHAGE₂₃
BELIEVABILITY₂₃
BOUGAINVILLEA₁₉
BRACHYTHERAPY₃₁
BUTTERFINGERS₁₉
BENEFICIATION₂₀
BIOCHEMICALLY₂₇
BOARDINGHOUSE₂₀
BIOCOMPATIBLE₂₃
BELLIGERENTLY₁₉
BIREFRINGENCE₂₁
BIBLIOGRAPHER₂₃
BOUILLABAISSE₁₇
BILDUNGSROMAN₁₉
BIOGEOGRAPHIC₂₄
BIOENGINEERED₁₇
BALKANIZATION₂₈
BRONCHIOLITIS₂₀
BACHELORETTES₂₀
BLOODCURDLING₂₀
BLACKCURRANTS₂₃
BRACHIOSAURUS₂₀
BLANDISHMENTS₂₁
BIOINFORMATIC₂₂
BELONGINGNESS₁₇
BIOELECTRICAL₁₉
BIOENERGETICS₁₈
BREATHABILITY₂₃

Showing the top 48 of 431 words. See every valid word

All valid words 431

A to Z. Includes rare and Collins-only words. Linked tiles open the word's meaning, score and rhymes.

BABINGTONITES₁₈
BABYISHNESSES₂₃
BACCALAUREATE₁₉
BACCHANALIANS₂₂
BACHELORETTES₂₀
BACHELORHOODS₂₄
BACHELORSHIPS₂₅
BACKCHECKINGS₃₃
BACKCOUNTRIES₂₃
BACKGAMMONING₂₇
BACKGROUNDERS₂₃
BACKGROUNDING₂₄
BACKLIGHTINGS₂₆
BACKPEDALLING₂₅
BACKSCATTERED₂₄
BACKSCRATCHED₂₉
BACKSCRATCHER₂₈
BACKSCRATCHES₂₈
BACKSHEESHING₂₈
BACKSLAPPINGS₂₆
BACKSTABBINGS₂₆
BACKSTITCHING₂₇
BACKSTRAIGHTS₂₅
BACKSTRETCHES₂₆
BACKSWORDSMAN₂₇
BACKSWORDSMEN₂₇
BACKTRACKINGS₂₈
BACKWARDATION₂₅
BACKWOODSIEST₂₅
BACTERIOCIDAL₂₀
BACTERIOCIDES₂₀
BACTERIOLOGIC₂₀
BACTERIOLYSES₂₀
BACTERIOLYSIN₂₀
BACTERIOLYSIS₂₀
BACTERIOLYTIC₂₂
BACTERIOPHAGE₂₃
BACTERIOPHAGY₂₆
BACTERIOSTATS₁₇
BACTERIOTOXIN₂₄
BACTERISATION₁₇
BACTERIZATION₂₆
BACULOVIRUSES₂₀
BALDERLOCKSES₂₂
BALEFULNESSES₁₈
BALKANISATION₁₉
BALKANIZATION₂₈
BALLADMONGERS₁₉
BALLANWRASSES₁₈
BALLETOMANIAS₁₇
BALLHANDLINGS₂₀
BALLISTICALLY₂₀
BALLISTOSPORE₁₇
BALLOTTEMENTS₁₇
BALMORALITIES₁₇
BALNEOLOGICAL₁₈
BALNEOLOGISTS₁₆
BALNEOTHERAPY₂₃
BALSAMIFEROUS₂₀
BAMBOOZLEMENT₃₀
BANALISATIONS₁₅
BANALIZATIONS₂₄
BANCASSURANCE₁₉
BANDERILLEROS₁₆
BANDSPREADING₂₀
BANEFULNESSES₁₈
BANKABILITIES₂₁
BANTAMWEIGHTS₂₄
BARAESTHESIAS₁₈
BARBARIANISMS₁₉
BARBARISATION₁₇
BARBARIZATION₂₆
BARBAROUSNESS₁₇
BARBERSHOPPER₂₄
BAREFACEDNESS₂₁
BARNSBREAKING₂₂
BARNSTORMINGS₁₈
BARORECEPTORS₁₉
BARRISTERSHIP₂₀
BASHFULNESSES₂₁
BASIDIOMYCETE₂₃
BASIDIOSPORES₁₈
BASIFICATIONS₂₀
BASKETBALLERS₂₁
BASKETWEAVERS₂₅
BATHYLIMNETIC₂₅
BATHYMETRICAL₂₅
BATTLEDRESSES₁₆
BATTLEGROUNDS₁₇
BEACHCOMBINGS₂₇
BEARABILITIES₁₇
BEARDEDNESSES₁₇
BEARDLESSNESS₁₆
BEARISHNESSES₁₈
BEASTLINESSES₁₅
BEATIFICATION₂₀
BEAUMONTAGUES₁₈
BEAUTEOUSNESS₁₅
BEAUTIFULLEST₁₈
BEAUTIFULNESS₁₈
BEAUTYBERRIES₂₀
BEDAZZLEMENTS₃₆
BEETLEBRAINED₁₈
BEFUDDLEMENTS₂₂
BEGINNINGLESS₁₇
BEHAVIORALIST₂₁
BEHAVIORISTIC₂₃
BEHAVIOURALLY₂₄
BEHAVIOURISMS₂₃
BEHAVIOURISTS₂₁
BELATEDNESSES₁₆
BELEAGUERMENT₁₈
BELIEVABILITY₂₃
BELITTLEMENTS₁₇
BELLFOUNDRIES₁₉
BELLICOSITIES₁₇
BELLIGERENCES₁₈
BELLIGERENTLY₁₉
BELLYBOATINGS₂₁
BELLYFLOPPING₂₆
BELONEPHOBIAS₂₂
BELONGINGNESS₁₇
BELONOPHOBIAS₂₂
BENCHMARKINGS₂₇
BENEDICTIONAL₁₈
BENEFICENTIAL₂₀
BENEFICIARIES₂₀
BENEFICIATING₂₁
BENEFICIATION₂₀
BENIGHTEDNESS₂₀
BENIGHTENINGS₂₀
BENTHOPELAGIC₂₃
BENZALDEHYDES₃₂
BENZIMIDAZOLE₃₆
BENZOAPYRENES₂₉
BENZOPHENONES₂₉
BENZOQUINONES₃₃
BEQUEATHMENTS₂₉
BERTILLONAGES₁₆
BESEEMINGNESS₁₈
BESPOTTEDNESS₁₈
BESTSELLERDOM₁₈
BETACAROTENES₁₇
BETWEENBRAINS₂₀
BETWEENNESSES₁₈
BETWEENWHILES₂₄
BEWILDERINGLY₂₃
BEWILDERMENTS₂₁
BIBLIOGRAPHER₂₃
BIBLIOGRAPHIC₂₅
BIBLIOLATRIES₁₇
BIBLIOLATRIST₁₇
BIBLIOLATROUS₁₇
BIBLIOLOGICAL₂₀
BIBLIOLOGISTS₁₈
BIBLIOMANCIES₂₁
BIBLIOMANIACS₂₁
BIBLIOPEGISTS₂₀
BIBLIOPHAGIST₂₃
BIBLIOPHILIES₂₂
BIBLIOPHILISM₂₄
BIBLIOPHILIST₂₂
BIBLIOPHOBIAS₂₄
BIBLIOPOLICAL₂₁
BIBLIOPOLISTS₁₉
BIBLIOTHECARY₂₅
BIBLIOTHERAPY₂₅
BICAMERALISMS₂₁
BICAMERALISTS₁₉
BICENTENARIES₁₇
BICENTENNIALS₁₇
BICONCAVITIES₂₂
BICONDITIONAL₁₈
BICONVEXITIES₂₇
BICULTURALISM₁₉
BIDDABILITIES₁₉
BIDIRECTIONAL₁₈
BIGHEADEDNESS₂₁
BIGNONIACEOUS₁₈
BILATERALISMS₁₇
BILDUNGSROMAN₁₉
BILINGUALISED₁₇
BILINGUALISES₁₆
BILINGUALISMS₁₈
BILINGUALIZED₂₆
BILINGUALIZES₂₅
BILIOUSNESSES₁₅
BILLINGSGATES₁₇
BILLOWINESSES₁₈
BILLSTICKINGS₂₂
BIMETALLISTIC₁₉
BIMILLENARIES₁₇
BIMILLENNIALS₁₇
BIMILLENNIUMS₁₉
BIMOLECULARLY₂₂
BINDINGNESSES₁₇
BIOABSORBABLE₂₁
BIOACCUMULATE₂₁
BIOACTIVITIES₂₀
BIOBEHAVIORAL₂₃
BIOCENOLOGIES₁₈
BIOCHEMICALLY₂₇
BIOCOMPATIBLE₂₃
BIOCOMPUTINGS₂₂
BIOCONVERSION₂₀
BIODEGRADABLE₂₀
BIOECOLOGICAL₂₀
BIOECOLOGISTS₁₈
BIOELECTRICAL₁₉
BIOENERGETICS₁₈
BIOENGINEERED₁₇
BIOEQUIVALENT₂₇
BIOFLAVONOIDS₂₂
BIOGEOGRAPHER₂₂
BIOGEOGRAPHIC₂₄
BIOGRAPHISING₂₂
BIOGRAPHIZING₃₁
BIOINDUSTRIES₁₆
BIOINFORMATIC₂₂
BIOMECHANICAL₂₄
BIOMETRICALLY₂₂
BIOMETRICIANS₁₉
BIOPESTICIDAL₂₀
BIOPESTICIDES₂₀
BIOPHYSICALLY₂₈
BIOPHYSICISTS₂₅
BIOPROSPECTED₂₂
BIOPROSPECTOR₂₁
BIOPSYCHOLOGY₂₉
BIOREFINERIES₁₈
BIOSATELLITES₁₅
BIOSCIENTIFIC₂₂
BIOSCIENTISTS₁₇
BIOSECURITIES₁₇
BIOSTATICALLY₂₀
BIOSTATISTICS₁₇
BIOSYSTEMATIC₂₂
BIOTECHNOLOGY₂₄
BIOTELEMETRIC₁₉
BIOTERRORISMS₁₇
BIOTERRORISTS₁₅
BIOTURBATIONS₁₇
BIPARTISANISM₁₉
BIPROPELLANTS₁₉
BIRDWATCHINGS₂₅
BIREFRINGENCE₂₁
BISECTIONALLY₂₀
BISEXUALITIES₂₂
BISMUTHINITES₂₀
BISYMMETRICAL₂₄
BITTERBRUSHES₂₀
BITTERCRESSES₁₇
BITTERSWEETLY₂₁
BIZARRENESSES₂₄
BLABBERMOUTHS₂₄
BLACKBALLINGS₂₄
BLACKBERRYING₂₇
BLACKBIRDINGS₂₅
BLACKCURRANTS₂₃
BLACKGUARDING₂₄
BLACKGUARDISM₂₅
BLACKLISTINGS₂₂
BLACKSMITHING₂₇
BLADDERWRACKS₂₆
BLAMEABLENESS₁₉
BLAMELESSNESS₁₇
BLANCHISSEUSE₂₀
BLANDISHMENTS₂₁
BLANKETFLOWER₂₅
BLASPHEMOUSLY₂₅
BLASTOGENESES₁₆
BLASTOGENESIS₁₆
BLASTOGENETIC₁₈
BLASTOMYCOSES₂₂
BLASTOMYCOSIS₂₂
BLASTOSPHERES₂₀
BLASTULATIONS₁₅
BLATHERSKITES₂₂
BLENNORRHOEAS₁₈
BLEPHARITISES₂₀
BLEPHAROPLAST₂₂
BLEPHAROSPASM₂₄
BLESSEDNESSES₁₆
BLETHERATIONS₁₈
BLETHERSKATES₂₂
BLINDSTITCHED₂₂
BLINDSTITCHES₂₁
BLOATEDNESSES₁₆
BLOCKBUSTINGS₂₄
BLOCKHEADEDLY₂₉
BLOKISHNESSES₂₂
BLOODCURDLING₂₀
BLOODLESSNESS₁₆
BLOODLETTINGS₁₇
BLOTCHINESSES₂₀
BLUEISHNESSES₁₈
BLUESNARFINGS₁₉
BLUESTOCKINGS₂₂
BLUNDERBUSSES₁₈
BLURREDNESSES₁₆
BOARDINGHOUSE₂₀
BOARDSAILINGS₁₇
BOARISHNESSES₁₈
BOATBUILDINGS₁₉
BOBSLEIGHINGS₂₂
BODDHISATTVAS₂₃
BODYBOARDINGS₂₃
BODYBUILDINGS₂₃
BODYSNATCHERS₂₄
BODYSNATCHING₂₅
BOILERPLATING₁₈
BOMBASTICALLY₂₄
BONNYCLABBERS₂₄
BOOKBINDERIES₂₂
BOOKCROSSINGS₂₂
BOOKISHNESSES₂₂
BOORISHNESSES₁₈
BOOTSTRAPPERS₁₉
BOOTSTRAPPING₂₀
BORAGINACEOUS₁₈
BORBORYGMUSES₂₃
BOROSILICATES₁₇
BOTANOMANCIES₁₉
BOTTLEBRUSHES₂₀
BOTTLENECKING₂₂
BOUGAINVILIAS₁₉
BOUGAINVILLEA₁₉
BOUILLABAISSE₁₇
BOULEVARDIERS₁₉
BOUNDEDNESSES₁₇
BOUNDLESSNESS₁₆
BOUNTEOUSNESS₁₅
BOUNTIFULNESS₁₈
BOURGUIGNONNE₁₇
BOUSTROPHEDON₂₁
BOYSENBERRIES₂₀
BRACHIOSAURUS₂₀
BRACHYCEPHALS₃₀
BRACHYCEPHALY₃₃
BRACHYDACTYLY₃₂
BRACHYPTERISM₂₇
BRACHYPTEROUS₂₅
BRACHYTHERAPY₃₁
BRADYKINESIAS₂₃
BRAGGADOCIOUS₂₀
BRAILLEWRITER₁₈
BRAINCHILDREN₂₁
BRAINLESSNESS₁₅
BRAINSICKNESS₂₁
BRAINSTORMERS₁₇
BRAINSTORMING₁₈
BRAINWASHINGS₂₂
BRANFULNESSES₁₈
BRASSFOUNDERS₁₉
BRASSFOUNDING₂₀
BRASSICACEOUS₁₉
BREADBOARDING₂₀
BREADCRUMBING₂₃
BREADWINNINGS₂₀
BREAKABLENESS₂₁
BREAKDANCINGS₂₃
BREAKTHROUGHS₂₆
BREASTFEEDERS₁₉
BREASTFEEDING₂₀
BREASTPLOUGHS₂₁
BREASTSTROKER₁₉
BREASTSTROKES₁₉
BREASTSUMMERS₁₉
BREATHABILITY₂₃
BREATHALYSERS₂₁
BREATHALYSING₂₂
BREATHALYZERS₃₀
BREATHALYZING₃₁
BREATHINESSES₁₈
BREECHLOADERS₂₁
BRICKFIELDERS₂₅
BRILLIANTINES₁₅
BRILLIANTNESS₁₅
BRIMFULNESSES₂₀
BRINKMANSHIPS₂₆
BRINKSMANSHIP₂₆
BRISTLINESSES₁₅
BRITTLEBUSHES₂₀
BRITTLENESSES₁₅
BROADCASTINGS₁₉
BROADMINDEDLY₂₃
BROCCOFLOWERS₂₅
BROKENHEARTED₂₃
BROMELIACEOUS₁₉
BROMOCRIPTINE₂₁
BRONCHIOLITES₂₀
BRONCHIOLITIS₂₀
BRONCHOGRAPHY₂₉
BRONCHOSCOPES₂₄
BRONCHOSCOPIC₂₆
BRONCHOSPASMS₂₄
BRONCOBUSTERS₁₉
BRONCOBUSTING₂₀
BROTHERLINESS₁₈
BRUSQUENESSES₂₄
BRUTALISATION₁₅
BRUTALIZATION₂₄
BRUTISHNESSES₁₈
BUCCANEERINGS₂₀
BUFFALOFISHES₂₇
BULBOPHYLLUMS₂₇
BULBOUSNESSES₁₇
BULLETPROOFED₂₁
BULLFIGHTINGS₂₃
BULLISHNESSES₁₈
BULLSHITTINGS₁₉
BUMBLEBERRIES₂₁
BUMPTIOUSNESS₁₉
BUOYANTNESSES₁₈
BUPRENORPHINE₂₂
BUREAUCRACIES₁₉
BUREAUCRATESE₁₇
BUREAUCRATISE₁₇
BUREAUCRATISM₁₉
BUREAUCRATIST₁₇
BUREAUCRATIZE₂₆
BURGLARIOUSLY₁₉
BUSHWHACKINGS₃₁
BUSINESSWOMAN₂₀
BUSINESSWOMEN₂₀
BUTTERFINGERS₁₉
BUTTERINESSES₁₅
BUTTONHOLDING₂₀
BUTTONHOOKING₂₃
BUTYRALDEHYDE₂₆
BUTYROPHENONE₂₃

Letters by positionIn 61% of these words the 13th letter is S.

2nd letter

I25%
A21%
R16%

3rd letter

O18%
A14%
C12%

10th letter

I22%
S13%
T9%

11th letter

I23%
S16%
N13%

12th letter

E29%
N10%
S10%

13th letter

S61%
G7%
Y6%

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses

Score spreadMost of these words score 20 in Scrabble; BENZIMIDAZOLE tops the list with 36. Scores before board bonuses.

1515 points: 15 words
16 points: 15 words
1717 points: 46 words
18 points: 48 words
1919 points: 43 words
20 points: 58 words
2121 points: 31 words
22 points: 39 words
2323 points: 29 words
24 points: 28 words
2525 points: 22 words
26 points: 16 words
2727 points: 14 words
28 points: 6 words
2929 points: 7 words
30 points: 3 words
3131 points: 4 words
32 points: 2 words
3333 points: 3 words
34 points: 0 words
3535 points: 0 words
36 points: 2 words

Word	Scrabble	Words With Friends	Dictionaries
BENZIMIDAZOLE	36	40	All three
BEDAZZLEMENTS	36	40	All three
BRACHYCEPHALY	33	34	All three
BENZOQUINONES	33	38	Collins · NWL
BACKCHECKINGS	33	38	NWL only
BRACHYDACTYLY	32	32	Collins only
BENZALDEHYDES	32	33	All three
BRACHYTHERAPY	31	30	Collins · NWL
BREATHALYZING	31	33	Collins · NWL
BUSHWHACKINGS	31	34	Collins only
BIOGRAPHIZING	31	35	Collins only
BREATHALYZERS	30	30	Collins only

B opens a striking mix of long words: breastfeeding, beneficiaries, biotechnology, and businesswoman are among the examples. The list spans several tournament dictionaries, but their coverage differs, so a word accepted in one may not work in another. Only three entries rank among the 25,000 most common English words, which makes these B words more useful for exact-length clues than everyday conversation.

The numbers behind this B list

There are 431 qualifying 13-letter words beginning with B.
Collins includes 387, NWL2023 includes 297, and ENABLE includes 219; dictionary totals overlap.
Just three entries fall inside the 25,000-word frequency band.
The most frequent final letter is S, appearing on 262 words.
BENZIMIDAZOLE and BEDAZZLEMENTS each score 36 points before board bonuses.

Which B words score the most?

BENZIMIDAZOLE and BEDAZZLEMENTS lead the scoring list at 36 points apiece. Both pack valuable letters into a 13-letter play, though their specialist vocabulary makes them less familiar than biotechnology or brainstorming.

Next come BRACHYCEPHALY, BENZOQUINONES, and BACKCHECKINGS at 33 points each. BRACHYTHERAPY scores 31, matching BREATHALYZING and BUSHWHACKINGS. Treat these as scoring candidates rather than automatic plays.

The list's average score is 21.1, well below its 36-point leaders. That gap makes letter-heavy outliers worth checking when you have a long rack, but board placement still determines the final total.

How should you use 13-letter words starting with B?

For a fixed-length clue, start with recognizable examples such as BREAKTHROUGHS, BUSINESSWOMAN, and BRAINSTORMING, then compare the remaining letters in your puzzle. The examples also span different word forms, from the plural BREAKTHROUGHS to the activity BRAINSTORMING.

A useful check is the ending: 262 of these words finish in S, far more than any other recorded final letter. If your pattern ends differently, keep the other recorded endings in mind, including G, Y, E, and N.

This is not an everyday-word shortlist: only three entries fall inside that frequency band, and dictionary coverage is uneven. Check your game's word list before playing a less familiar candidate; Collins, NWL2023, and ENABLE do not include the same number of entries.

Questions people ask

How many 13-letter words start with B?

There are 431 qualifying 13-letter words that start with B. The total combines entries found in at least one tournament dictionary, so it is broader than the count from any single dictionary. Examples include BIOTECHNOLOGY, BENEFICIARIES, and BUSINESSWOMAN.

Which 13-letter B word has the highest Scrabble score?

BENZIMIDAZOLE and BEDAZZLEMENTS tie at 36 points. Those are the top base scores in this group, before any board-square bonuses. BRACHYCEPHALY, BENZOQUINONES, and BACKCHECKINGS follow at 33 points.

Do all 13-letter B words appear in every word-game dictionary?

No, dictionary coverage differs. Collins contains 387 entries, NWL2023 contains 297, and ENABLE contains 219, with overlap between those groups. Check the word list used by your game, especially before trying a specialist term such as BENZIMIDAZOLE.

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