13-letter words ending in M

13-letter words ending in M number 245; zygodactylism leads the Scrabble scores at 34 points.

245 wordsTop pick INDIVIDUALISMHighest score ZYGODACTYLISM 34

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

S ends the most 13-letter words (7,018); K ends the fewest (7). M ranks #11 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 245 · most-used first

INDIVIDUALISM₂₀
PROTECTIONISM₁₉
NEOLIBERALISM₁₇
POSTMODERNISM₂₀
REPUBLICANISM₂₁
IMPRESSIONISM₁₉
VEGETARIANISM₁₉
CHRYSANTHEMUM₂₈
EXPRESSIONISM₂₄
PERFECTIONISM₂₂
PROGRESSIVISM₂₁
MYCOBACTERIUM₂₆
COMMERCIALISM₂₃
MICROORGANISM₂₀
EXHIBITIONISM₂₇
STRUCTURALISM₁₇
FUNCTIONALISM₂₀
PARALLELOGRAM₁₈
ETHNOCENTRISM₂₀
ANTITERRORISM₁₅
COLLOQUIALISM₂₆
SADOMASOCHISM₂₃
VENTRILOQUISM₂₇
SCHOLASTICISM₂₂
INDUSTRIALISM₁₆
UNILATERALISM₁₅
NEOCLASSICISM₁₉
PROVINCIALISM₂₂
HOMOEROTICISM₂₂
CONCEPTUALISM₂₁
HOMEOMORPHISM₂₇
PARTICULARISM₁₉
ANTINOMIANISM₁₇
ARMAMENTARIUM₁₉
ANTICOMMUNISM₂₁
MULTIPLATINUM₁₉
HELIOCENTRISM₂₀
SUPERORGANISM₁₈
FLUNITRAZEPAM₂₉
INDETERMINISM₁₈
INTERFEROGRAM₁₉
MANAGERIALISM₁₈
CONTEXTUALISM₂₄
EQUESTRIANISM₂₄
IRRATIONALISM₁₅
ODONTOGLOSSUM₁₇
MILLENNIALISM₁₇
CATASTROPHISM₂₂

Showing the top 48 of 245 words. See every valid word

All valid words 245

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

ABORIGINALISM₁₈
ABSTENTIONISM₁₇
ACADEMICALISM₂₂
ACARIDOMATIUM₂₀
ACARODOMATIUM₂₀
ACCIDENTALISM₂₀
ACTINOURANIUM₁₇
ADAPTATIONISM₁₈
AGROTERRORISM₁₆
ALDOSTERONISM₁₆
ALPHABETIFORM₂₅
AMPHIGASTRIUM₂₃
ANAGRAMMATISM₂₀
ANALPHABETISM₂₂
ANASTIGMATISM₁₈
ANDROCENTRISM₁₈
ANDRODIOECISM₁₉
ANNEXATIONISM₂₂
ANTICLINORIUM₁₇
ANTICOMMUNISM₂₁
ANTIFORMALISM₂₀
ANTILOGARITHM₁₉
ANTIMODERNISM₁₈
ANTINOMIANISM₁₇
ANTIRITUALISM₁₅
ANTISEPTICISM₁₉
ANTISOCIALISM₁₇
ANTITERRORISM₁₅
APOCHROMATISM₂₄
APOGEOTROPISM₂₀
ARISTOCRATISM₁₇
ARMAMENTARIUM₁₉
AUTOCHTHONISM₂₃
AUTOEROTICISM₁₇
AUTORADIOGRAM₁₇
AUTOSCHEDIASM₂₁
BESTSELLERDOM₁₈
BIBLIOPHILISM₂₄
BICULTURALISM₁₉
BIPARTISANISM₁₉
BLACKGUARDISM₂₅
BLEPHAROSPASM₂₄
BRACHYPTERISM₂₇
BUREAUCRATISM₁₉
CAESAROPAPISM₂₁
CATASTROPHISM₂₂
CATECHUMENISM₂₄
CEREMONIALISM₁₉
CHIAROSCURISM₂₂
CHOLANGIOGRAM₂₂
CHRYSANTHEMUM₂₈
COCHLEARIFORM₂₅
COLLOQUIALISM₂₆
COMMERCIALISM₂₃
COMPATRIOTISM₂₁
CONCEPTUALISM₂₁
CONFEDERALISM₂₁
CONNECTIONISM₁₉
CONTEXTUALISM₂₄
CONTORTIONISM₁₇
CONTRABANDISM₂₀
CONTRARIANISM₁₇
CORPORATIVISM₂₂
COSMOPOLITISM₂₁
COUNTERREFORM₂₀
COUNTERSTREAM₁₇
CREDENTIALISM₁₈
DECAMETHONIUM₂₃
DESCRIPTIVISM₂₃
DEVOLUTIONISM₁₉
DEVOTIONALISM₁₉
DIAGEOTROPISM₁₉
DILETTANTEISM₁₆
DOCTRINAIRISM₁₈
DODECAPHONISM₂₄
DUNDERHEADISM₂₁
ECUMENICALISM₂₁
ELECTROMERISM₁₉
ENCEPHALOGRAM₂₃
ENCYCLOPEDISM₂₅
EPIGRAMMATISM₂₂
EQUESTRIANISM₂₄
ETHNOCENTRISM₂₀
EVANGELIARIUM₁₉
EXHIBITIONISM₂₇
EXPRESSIONISM₂₄
FERROCHROMIUM₂₅
FEUILLETONISM₁₈
FILIBUSTERISM₂₀
FLAGELLANTISM₁₉
FLUNITRAZEPAM₂₉
FRACTIONALISM₂₀
FRINGILLIFORM₂₂
FRUITARIANISM₁₈
FUNCTIONALISM₂₀
GENERATIONISM₁₆
GEOCENTRICISM₂₀
GYNOMONOECISM₂₃
GYROMAGNETISM₂₂
HELIOCENTRISM₂₀
HETEROSTYLISM₂₁
HEXAMETHONIUM₃₀
HISTRIONICISM₂₀
HOMEOMORPHISM₂₇
HOMOEROTICISM₂₂
HOMOSEXUALISM₂₇
HYPERURBANISM₂₅
HYPOCHONDRIUM₂₉
ICONOMATICISM₂₁
IMMATERIALISM₁₉
IMPOSSIBILISM₂₁
IMPRESSIONISM₁₉
INCLINATORIUM₁₇
INDETERMINISM₁₈
INDIVIDUALISM₂₀
INDUSTRIALISM₁₆
INFALLIBILISM₂₀
INTERFEROGRAM₁₉
IRRATIONALISM₁₅
ISODIMORPHISM₂₃
LECTISTERNIUM₁₇
LIBERATIONISM₁₇
MANAGERIALISM₁₈
MATHEMATICISM₂₄
MECHANICALISM₂₄
MESOCEPHALISM₂₄
METEMPIRICISM₂₃
MICROORGANISM₂₀
MIDDLEBROWISM₂₄
MILLENNIALISM₁₇
MILLENNIANISM₁₇
MILLENNIARISM₁₇
MONOMETALLISM₁₉
MONOPHYSITISM₂₅
MONOSYLLABISM₂₂
MONOTHELETISM₂₀
MONOTHELITISM₂₀
MOUNTEBANKISM₂₃
MULTIPARTYISM₂₂
MULTIPLATINUM₁₉
MYCOBACTERIUM₂₆
NEOCLASSICISM₁₉
NEOLIBERALISM₁₇
NEOPLASTICISM₁₉
NONCONFORMISM₂₂
NONMAINSTREAM₁₇
OCCASIONALISM₁₉
OCCIDENTALISM₂₀
ODONTOGLOSSUM₁₇
ORNAMENTALISM₁₇
ORTHOGNATHISM₂₂
PAEDOMORPHISM₂₅
PANAESTHETISM₂₀
PANCHROMATISM₂₄
PANSPERMATISM₂₁
PARALLELOGRAM₁₈
PARAMAGNETISM₂₀
PARAMENSTRUUM₁₉
PARTICULARISM₁₉
PEDESTRIANISM₁₈
PENICILLIFORM₂₂
PERFECTIONISM₂₂
PERICHONDRIUM₂₃
PERSPECTIVISM₂₄
PHALANSTERISM₂₀
PHENOMENALISM₂₂
PHILHELLENISM₂₃
PHOTOCHROMISM₂₇
PLAGIOTROPISM₂₀
PLATINIRIDIUM₁₈
PLETHYSMOGRAM₂₆
POCOCURANTISM₂₁
POLYDACTYLISM₂₆
POLYDAEMONISM₂₃
POLYNOMIALISM₂₂
POLYSYLLABISM₂₅
POLYSYLLOGISM₂₄
POSTMODERNISM₂₀
PRIMORDIALISM₂₀
PROGRESSIVISM₂₁
PROTECTIONISM₁₉
PROTOACTINIUM₁₉
PROVERBIALISM₂₂
PROVINCIALISM₂₂
PRUDENTIALISM₁₈
PYCNOCONIDIUM₂₅
RADIOTELEGRAM₁₇
REACTIONARISM₁₇
REPUBLICANISM₂₁
REVOLUTIONISM₁₈
ROENTGENOGRAM₁₇
RUTHERFORDIUM₂₂
SACERDOTALISM₁₈
SADOMASOCHISM₂₃
SANITARIANISM₁₅
SANSCULOTTISM₁₇
SCALPELLIFORM₂₂
SCHOLASTICISM₂₂
SCHOOLMARMISM₂₄
SCOLOPENDRIUM₂₀
SCRIPTURALISM₁₉
SEPARATIONISM₁₇
SKEUOMORPHISM₂₆
SOLIFIDIANISM₁₉
SPATHIPHYLLUM₂₈
STEREOTROPISM₁₇
STROMBULIFORM₂₂
STRUCTURALISM₁₇
SUCCINCTORIUM₂₁
SUFFRAGETTISM₂₂
SUGGESTIONISM₁₇
SUPERORGANISM₁₈
SUSTENTACULUM₁₇
TAUTOCHRONISM₂₀
TELESCOPIFORM₂₂
TELEVANGELISM₁₉
THAUMATURGISM₂₁
THEANTHROPISM₂₃
THEATRICALISM₂₀
THERMOTROPISM₂₂
THIGMOTROPISM₂₃
TINTINNABULUM₁₇
TOLERATIONISM₁₅
TRANSEXUALISM₂₂
TRICHROMATISM₂₂
TRILATERALISM₁₅
TRILINGUALISM₁₆
TRILITERALISM₁₅
TROPHOTROPISM₂₂
ULTRARIGHTISM₁₉
ULTRASONOGRAM₁₆
UMBRACULIFORM₂₄
UNATHLETICISM₂₀
UNICAMERALISM₁₉
UNILATERALISM₁₅
UNILINGUALISM₁₆
VEGETARIANISM₁₉
VENTRILOQUISM₂₇
VERNACULARISM₂₀
VIBRACULARIUM₂₂
VIVISECTORIUM₂₃
VOCATIONALISM₂₀
XANTHOCHROISM₃₀
ZOOSPORANGIUM₂₇
ZYGODACTYLISM₃₄

Letters by positionIn 87% of these words the 11th letter is I.

2nd letter

O16%
E14%
N11%

8th letter

I18%
R16%
T12%

9th letter

A35%
O22%
I14%

10th letter

L24%
N20%
R13%

11th letter

I87%
R4%
O4%

12th letter

S78%
U13%
A5%

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses

Score spreadMost of these words score 19 in Scrabble; ZYGODACTYLISM tops the list with 34. Scores before board bonuses.

1515 points: 8 words
16 points: 8 words
1717 points: 31 words
18 points: 19 words
1919 points: 33 words
20 points: 33 words
2121 points: 18 words
22 points: 32 words
2323 points: 17 words
24 points: 17 words
2525 points: 10 words
26 points: 5 words
2727 points: 7 words
28 points: 2 words
2929 points: 2 words
30 points: 2 words
3131 points: 0 words
32 points: 0 words
3333 points: 0 words
34 points: 1 words

Word	Scrabble	Words With Friends	Dictionaries
ZYGODACTYLISM	34	36	Collins only
HEXAMETHONIUM	30	32	All three
XANTHOCHROISM	30	31	Collins only
FLUNITRAZEPAM	29	34	Collins only
HYPOCHONDRIUM	29	31	Collins only
CHRYSANTHEMUM	28	30	All three
SPATHIPHYLLUM	28	31	Collins only
EXHIBITIONISM	27	29	All three
VENTRILOQUISM	27	32	All three
HOMEOMORPHISM	27	29	All three
HOMOSEXUALISM	27	30	Collins only
PHOTOCHROMISM	27	29	All three

The list ranges from familiar forms such as individualism and protectionism to specialist terms like zygodactylism. None ranks among the 25,000 most common English words, so expect a vocabulary-heavy set rather than everyday choices. The dictionary counts also differ: Collins includes more of these words than NWL2023 or ENABLE.

Counts, coverage, and scoring at a glance

There are 245 tournament-dictionary entries that finish with M.
Collins includes 230, compared with 123 in NWL2023 and 98 in ENABLE.
The average score is 20.7; zygodactylism tops the list at 34.
A is the most frequent first letter, with 36 entries; P follows with 35.
No entry ranks among the most common English words, despite recognizable examples such as individualism.

Why do these words cluster around -ism?

Many examples name systems, beliefs, or styles: individualism, neoliberalism, postmodernism, impressionism, and vegetarianism all share the -ism ending. That recurring suffix gives the list a strong abstract-noun feel, even though the entries cover politics, art, and food. Protectionism and commercialism add economic and business senses to the same pattern.

Other words stand out for their construction. Chrysanthemum ends in M without the -ism pattern, while parallelogram and microorganism offer different internal rhythms. With 36 A-openers and 35 P-openers, those two starting letters nearly tie for the largest group.

Choosing 13-letter words ending in M

For a score-first search, start with zygodactylism at 34 points; hexamethonium and xanthochroism each score 30. These are specialist words, though, not easy everyday plays. Chrysanthemum is more recognizable and scores 28, while exhibitionism and ventriloquism each score 27.

The ending is uncommon among words of this length: 13-letter words ending in S number 7,018, far more than the 245 ending in M. Treat the dictionary totals as separate coverage, not a promise that every game accepts every entry; check your game's word list before playing. Definitions cover 204 of the 245 entries.

Questions people ask

Which 13-letter word ending in M scores the most?

Zygodactylism is the highest scorer, with 34 Scrabble points. Hexamethonium and xanthochroism follow at 30 points each. These high-scoring choices are specialist vocabulary, so confirm that your game accepts the word before building a play around it.

Are all 245 words accepted in every word game?

No. The total combines entries found in tournament dictionaries, and their coverage differs: Collins has 230, NWL2023 has 123, and ENABLE has 98. A word appearing in one list is not necessarily accepted in another, so check the dictionary used by your game.

Are any of these 13-letter M-ending words common?

None ranks among the most common English words. Individualism, impressionism, and chrysanthemum may still look familiar, but the collection overall leans toward specialist terms such as zygodactylism and xanthochroism.

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