15-letter words starting with T

15-letter words starting with T number 278, including familiar forms like transformations and troubleshooting alongside rare technical terms.

278 wordsTop pick TRANSFORMATIONSHighest score TRANQUILIZINGLY 37

3 of 278 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 15-letter words (695); Y starts the fewest (2). T 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 278 · most-used first

TRANSFORMATIONS₂₀
TRANSPLANTATION₁₇
TECHNOLOGICALLY₂₆
TROUBLESHOOTING₂₁
TOTALITARIANISM₁₇
TRANSCRIPTIONAL₁₉
TRUSTWORTHINESS₂₁
TRADITIONALISTS₁₆
TRANSFIGURATION₁₉
TRANSLITERATION₁₅
THERAPEUTICALLY₂₅
TEMPERAMENTALLY₂₄
TOPOGRAPHICALLY₂₈
THROMBOEMBOLISM₂₈
TRANSFERABILITY₂₃
THIRTYSOMETHING₂₇
THOUGHTLESSNESS₂₂
TWENTYSOMETHING₂₇
TRYPANOSOMIASIS₂₂
TETRAHYDROFURAN₂₅
TROUBLESHOOTERS₂₀
TRANSLATIONALLY₁₈
TRANSPORTATIONS₁₇
TRIGONOMETRICAL₂₀
THERMOCHEMISTRY₃₀
TELECONFERENCES₂₂
TYPOGRAPHICALLY₃₁
TELEKINETICALLY₂₄
TRINITROTOLUENE₁₅
THERMODYNAMICAL₂₈
TRANSLITERATING₁₆
TRANSCENDENTALS₁₈
TRICHLOROACETIC₂₄
THERMOSTABILITY₂₅
THALASSOTHERAPY₂₆
TONSILLECTOMIES₁₉
TRICHLOROETHANE₂₃
TACHYARRHYTHMIA₃₄
TRIHALOMETHANES₂₃
TRANSNATIONALLY₁₈
TRANSHISTORICAL₂₀
TRANSPOSITIONAL₁₇
THERMORECEPTORS₂₄
TRANSMOGRIFYING₂₅
TRANSMUTATIONAL₁₇
TRIFLUOPERAZINE₂₉
TERATOCARCINOMA₂₁
TRADITIONALIZED₂₆

Showing the top 48 of 278 words. See every valid word

All valid words 278

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

TABLOIDIZATIONS₂₇
TABULARISATIONS₁₇
TABULARIZATIONS₂₆
TACHOMETRICALLY₂₇
TACHYARRHYTHMIA₃₄
TACHYMETRICALLY₃₀
TALKATIVENESSES₂₂
TANGENTIALITIES₁₆
TARSOMETATARSAL₁₇
TARSOMETATARSUS₁₇
TASTELESSNESSES₁₅
TATTERDEMALIONS₁₈
TATTERDEMALLION₁₈
TEACHABLENESSES₂₂
TECHNICALNESSES₂₂
TECHNOLOGICALLY₂₆
TECHNOSTRUCTURE₂₂
TECHNOTHRILLERS₂₃
TECTIBRANCHIATE₂₄
TEENSPLOITATION₁₇
TELANGIECTASIAS₁₈
TELAUTOGRAPHIES₂₁
TELECONFERENCED₂₃
TELECONFERENCES₂₂
TELECONNECTIONS₁₉
TELEGRAPHICALLY₂₆
TELEJOURNALISMS₂₄
TELEJOURNALISTS₂₂
TELEKINETICALLY₂₄
TELEPHOTOGRAPHS₂₆
TELEPHOTOGRAPHY₂₉
TELEPROCESSINGS₂₀
TELEROBOTICALLY₂₂
TELESTEREOSCOPE₁₉
TELETYPESETTING₂₁
TELETYPEWRITERS₂₃
TELOMERISATIONS₁₇
TELOMERIZATIONS₂₆
TEMERARIOUSNESS₁₇
TEMPERABILITIES₂₁
TEMPERAMENTALLY₂₄
TEMPERATENESSES₁₉
TEMPESTUOUSNESS₁₉
TEMPORARINESSES₁₉
TEMPTABLENESSES₂₁
TENACIOUSNESSES₁₇
TENDENCIOUSNESS₁₈
TENDENTIOUSNESS₁₆
TENDERHEARTEDLY₂₃
TENEBROUSNESSES₁₇
TENOSYNOVITIDES₂₂
TENOSYNOVITISES₂₁
TENOVAGINITISES₁₉
TENTACULIFEROUS₂₀
TENTATIVENESSES₁₈
TERATOCARCINOMA₂₁
TERATOGENICISTS₁₈
TERGIVERSATIONS₁₉
TERMINABILITIES₁₉
TERRESTRIALNESS₁₅
TERRITORIALISED₁₆
TERRITORIALISES₁₅
TERRITORIALISMS₁₇
TERRITORIALISTS₁₅
TERRITORIALIZED₂₅
TERRITORIALIZES₂₄
TESTIMONIALISED₁₈
TESTIMONIALISES₁₇
TESTIMONIALIZED₂₇
TESTIMONIALIZES₂₆
TETARTOHEDRALLY₂₂
TETARTOHEDRISMS₂₁
TETRABASICITIES₁₉
TETRABRANCHIATE₂₂
TETRAGRAMMATONS₂₀
TETRAHYDROFURAN₂₅
TETRAMETHYLLEAD₂₄
TETRASPORANGIUM₂₀
TETRASYLLABICAL₂₂
TEXTUALIZATIONS₃₁
THALAMENCEPHALA₂₇
THALASSOCRACIES₂₂
THALASSOGRAPHER₂₄
THALASSOGRAPHIC₂₆
THALASSOTHERAPY₂₆
THALATTOCRACIES₂₂
THANATOGNOMONIC₂₃
THANATOGRAPHIES₂₄
THANKLESSNESSES₂₂
THANKWORTHINESS₂₈
THAUMATOLATRIES₂₀
THEATRICALISING₂₁
THEATRICALITIES₂₀
THEATRICALIZING₃₀
THEOCENTRICISMS₂₄
THEOLOGISATIONS₁₉
THEOLOGIZATIONS₂₈
THEOREMATICALLY₂₅
THEOSOPHISTICAL₂₅
THERAPEUTICALLY₂₅
THERIANTHROPISM₂₅
THERIOMORPHISMS₂₇
THERIOMORPHOSES₂₅
THERIOMORPHOSIS₂₅
THERMAESTHESIAS₂₃
THERMALISATIONS₂₀
THERMALIZATIONS₂₉
THERMOBAROGRAPH₂₈
THERMOBAROMETER₂₄
THERMOCHEMISTRY₃₀
THERMOCHROMISMS₂₉
THERMODYNAMICAL₂₈
THERMOELECTRONS₂₂
THERMOJUNCTIONS₂₉
THERMOPERIODISM₂₅
THERMORECEPTORS₂₄
THERMOREGULATED₂₂
THERMOREGULATES₂₁
THERMOREGULATOR₂₁
THERMOREMANENCE₂₄
THERMOSTABILITY₂₅
THERMOTHERAPIES₂₅
THICKHEADEDNESS₂₉
THIMBLERIGGINGS₂₅
THINKABLENESSES₂₄
THIOBARBITURATE₂₂
THIRTYSOMETHING₂₇
THORACOCENTESES₂₂
THORACOCENTESIS₂₂
THORACOPLASTIES₂₂
THOROUGHGOINGLY₂₇
THOUGHTLESSNESS₂₂
THREEFOLDNESSES₂₂
THREEPENCEWORTH₂₈
THREEPENNYWORTH₂₉
THREMMATOLOGIES₂₃
THRILLINGNESSES₁₉
THROMBOEMBOLISM₂₈
THROMBOPLASTINS₂₄
THUNDERSTRICKEN₂₅
THUNDERSTRIKING₂₄
THYROCALCITONIN₂₅
THYROIDECTOMIES₂₆
TIGHTFISTEDNESS₂₃
TINTINNABULATED₁₈
TINTINNABULATES₁₇
TOASTMISTRESSES₁₇
TOLERABLENESSES₁₇
TOMBOYISHNESSES₂₅
TONSILLECTOMIES₁₉
TOOTHSOMENESSES₂₀
TOPOCHEMISTRIES₂₄
TOPOGRAPHICALLY₂₈
TORRENTIALITIES₁₅
TOTALITARIANISE₁₅
TOTALITARIANISM₁₇
TOTALITARIANIZE₂₄
TOUCHABLENESSES₂₂
TOXICOLOGICALLY₃₀
TRACEABLENESSES₁₉
TRACKLESSNESSES₂₁
TRACTABLENESSES₁₉
TRADITIONALISED₁₇
TRADITIONALISES₁₆
TRADITIONALISMS₁₈
TRADITIONALISTS₁₆
TRADITIONALIZED₂₆
TRADITIONALIZES₂₅
TRAINSPOTTERISH₂₀
TRANQUILISATION₂₄
TRANQUILISINGLY₂₈
TRANQUILIZATION₃₃
TRANQUILIZINGLY₃₇
TRANSACTIONALLY₂₀
TRANSAMINATIONS₁₇
TRANSCENDENCIES₂₀
TRANSCENDENTALS₁₈
TRANSCRIPTIONAL₁₉
TRANSCRIPTIVELY₂₅
TRANSEXUALITIES₂₂
TRANSFERABILITY₂₃
TRANSFIGURATION₁₉
TRANSFIGUREMENT₂₁
TRANSFORMATIONS₂₀
TRANSFUSIONISTS₁₈
TRANSGENDERISMS₁₉
TRANSGRESSIONAL₁₆
TRANSGRESSIVELY₂₂
TRANSHISTORICAL₂₀
TRANSIENTNESSES₁₅
TRANSILLUMINATE₁₇
TRANSISTORISING₁₆
TRANSISTORIZING₂₅
TRANSLATABILITY₂₀
TRANSLATIONALLY₁₈
TRANSLITERATING₁₆
TRANSLITERATION₁₅
TRANSLITERATORS₁₅
TRANSLUCIDITIES₁₈
TRANSMIGRATIONS₁₈
TRANSMISSOMETER₁₉
TRANSMITTANCIES₁₉
TRANSMOGRIFYING₂₅
TRANSMUTABILITY₂₂
TRANSMUTATIONAL₁₇
TRANSNATIONALLY₁₈
TRANSPARENTISED₁₈
TRANSPARENTISES₁₇
TRANSPARENTIZED₂₇
TRANSPARENTIZES₂₆
TRANSPARENTNESS₁₇
TRANSPIRATIONAL₁₇
TRANSPLANTATION₁₇
TRANSPORTATIONS₁₇
TRANSPORTEDNESS₁₈
TRANSPOSABILITY₂₂
TRANSPOSITIONAL₁₇
TRANSSEXUALISMS₂₄
TRANSUBSTANTIAL₁₇
TRANSVALUATIONS₁₈
TRANSVESTITISMS₂₀
TRAUMATISATIONS₁₇
TRAUMATIZATIONS₂₆
TRAUMATOLOGICAL₂₀
TRAUMATOLOGISTS₁₈
TRAUMATONASTIES₁₇
TREACHEROUSNESS₂₀
TREASONABLENESS₁₇
TREMULOUSNESSES₁₇
TRIANGULARITIES₁₆
TRIBROMOETHANOL₂₂
TRIBROMOMETHANE₂₄
TRIBUTARINESSES₁₇
TRICHINISATIONS₂₀
TRICHINIZATIONS₂₉
TRICHLOROACETIC₂₄
TRICHLOROETHANE₂₃
TRICHOMONACIDAL₂₅
TRICHOMONACIDES₂₅
TRIFLUOPERAZINE₂₉
TRIGONOMETRICAL₂₀
TRIHALOMETHANES₂₃
TRIIODOMETHANES₂₁
TRIMETHYLAMINES₂₅
TRINITROBENZENE₂₆
TRINITROCRESOLS₁₇
TRINITROPHENOLS₂₀
TRINITROTOLUENE₁₅
TRINITROTOLUOLS₁₅
TRIPERSONALISMS₁₉
TRIPERSONALISTS₁₇
TRIPHENYLAMINES₂₅
TRISOCTAHEDRONS₂₁
TRISYLLABICALLY₂₅
TRITUBERCULISMS₂₁
TRIVIALISATIONS₁₈
TRIVIALIZATIONS₂₇
TROPICALISATION₁₉
TROPICALIZATION₂₈
TROUBLESHOOTERS₂₀
TROUBLESHOOTING₂₁
TROUBLESOMENESS₁₉
TROUBLOUSNESSES₁₇
TRUEHEARTEDNESS₁₉
TRUSTLESSNESSES₁₅
TRUSTWORTHINESS₂₁
TRUTHLESSNESSES₁₈
TRYPANOSOMIASES₂₂
TRYPANOSOMIASIS₂₂
TUBERCULISATION₁₉
TUBERCULIZATION₂₈
TUMORGENICITIES₂₀
TURBOGENERATORS₁₈
TWENTYSOMETHING₂₇
TYNDALLIMETRIES₂₁
TYPOGRAPHICALLY₃₁
TYRANNOSAURUSES₁₈
TYRANNOUSNESSES₁₈

Letters by positionIn 58% of these words the 15th letter is S.

2nd letter

R40%
E24%
H23%

3rd letter

A29%
E13%
I12%

12th letter

I28%
S13%
T13%

13th letter

S24%
I23%
O13%

14th letter

E33%
N17%
L10%

15th letter

S58%
Y11%
L5%

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses

Score spreadMost of these words score 17 in Scrabble; TRANQUILIZINGLY tops the list with 37. Scores before board bonuses.

1515 points: 12 words
16 points: 9 words
1717 points: 33 words
18 points: 24 words
1919 points: 24 words
20 points: 22 words
2121 points: 18 words
22 points: 30 words
2323 points: 11 words
24 points: 21 words
2525 points: 24 words
26 points: 13 words
2727 points: 10 words
28 points: 10 words
2929 points: 8 words
30 points: 4 words
3131 points: 2 words
32 points: 0 words
3333 points: 1 words
34 points: 1 words
3535 points: 0 words
36 points: 0 words
3737 points: 1 words

Word	Scrabble	Words With Friends	Dictionaries
TRANQUILIZINGLY	37	42	Collins only
TACHYARRHYTHMIA	34	31	All three
TRANQUILIZATION	33	37	Collins only
TYPOGRAPHICALLY	31	34	All three
TEXTUALIZATIONS	31	34	NWL only
THERMOCHEMISTRY	30	30	All three
THEATRICALIZING	30	33	All three
TOXICOLOGICALLY	30	35	All three
TACHYMETRICALLY	30	32	Collins only
TRIFLUOPERAZINE	29	33	All three
THICKHEADEDNESS	29	29	Collins only
TELEPHOTOGRAPHY	29	30	All three

T has a substantial set of long entries, but most are not everyday vocabulary: only 3 of the 278 words rank among the top 25,000 English words by frequency. The list ranges from trustworthiness to tetrahydrofuran, so exact spelling matters more than a familiar shape.

How many 15-letter words starting with T are there?

There are 278 entries, compared with 448 14-letter words that begin with T.
Transformations, transplantation, and technologically are among the examples.
A total of 266 entries appear in Collins, while 145 appear in NWL2023; those sets overlap.
The most common final letter is S: 161 words end that way, about 58% of the list.
Only 3 entries are common by the top-25,000 frequency measure.

Which patterns stand out among T words?

The endings are strikingly uneven. S accounts for 161 entries, while Y is next with 31; the remaining listed final letters each occur 15 times or fewer. That makes a final S a strong pattern to test when your rack or crossing letters leave the last position open.

Long technical and abstract terms fill much of the set. Thromboembolism and trypanosomiasis are specialized vocabulary, while troubleshooting is easier to recognize. A 15-letter match can fit the pattern yet still be hard to play, so confirm an unfamiliar word in the word list used by your game.

Can a 15-letter T word score well?

Tranquilizingly is the top scorer at 37 points, followed by tachyarrhythmia at 34 and tranquilization at 33. Those totals make unusual letter combinations worth inspecting, but the top score alone does not guarantee a playable word in your dictionary.

For 15-letter words starting with T, the average score is 21.6. The highest entries are not necessarily the easiest to remember: typographically scores 31, while thermochemistry scores 30. Learn the spelling before relying on a rare high-value play.

Questions people ask

What is the highest-scoring 15-letter word starting with T?

Tranquilizingly is the highest scorer in this group, with a score of 37. Tachyarrhythmia follows at 34, then tranquilization at 33. Check that your game accepts the word before planning a play around its score.

How many of these T words end in S?

A total of 161 of the 278 words end in S, or about 58%. Y is the next most common ending, with 31 words. The gap makes S the clear first ending to check when the final letter is unknown.

Are 15-letter words starting with T common in everyday English?

Only 3 entries meet the top-25,000 English-word frequency measure. Familiar examples such as troubleshooting sit beside technical terms such as tetrahydrofuran, so recognition varies widely. Treat a plausible-looking long word as a spelling clue, not proof that it is accepted in your game.

Keep going

Related lists

14-letter words start with T

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