15-letter words starting with H

255 15-letter words starting with H make a technical, low-frequency set; the highest score is 37.

255 wordsTop pick HOSPITALIZATIONHighest score HYDROXYBUTYRATE 37

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). H ranks #12 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 255 · most-used first

HOSPITALIZATION₂₉
HETEROSEXUALITY₂₈
HYPERTHYROIDISM₃₂
HUMANITARIANISM₂₂
HOSPITALISATION₂₀
HETERONORMATIVE₂₃
HEARTBREAKINGLY₂₈
HORTICULTURISTS₂₀
HEMOCHROMATOSIS₂₇
HETEROCHROMATIN₂₅
HYDROXYBUTYRATE₃₇
HISTORIOGRAPHIC₂₆
HISTOPATHOLOGIC₂₆
HISTORIOGRAPHER₂₄
HYDROGEOLOGICAL₂₆
HERMAPHRODITISM₂₈
HEMODYNAMICALLY₃₁
HYPERVENTILATES₂₆
HYPOVENTILATION₂₆
HYPOPITUITARISM₂₇
HYPERVENTILATED₂₇
HETEROGENEITIES₁₉
HETEROGENEOUSLY₂₂
HYPOCHONDRIASIS₂₉
HETEROCHROMATIC₂₇
HEMISPHERECTOMY₃₂
HYPERLIPIDAEMIA₂₈
HALLUCINOGENICS₂₃
HYDROSTATICALLY₂₇
HYPERCOAGULABLE₂₈
HYPNOTHERAPISTS₂₈
HYPOCHONDRIACAL₃₁
HYPERINSULINISM₂₅
HOLOGRAPHICALLY₂₉
HYPERPOLARIZING₃₅
HORTICULTURALLY₂₃
HYDROMETALLURGY₂₈
HYPERCORRECTION₂₇
HYDROXYLAPATITE₃₄
HYDROGEOLOGISTS₂₄
HENDECASYLLABLE₂₆
HEXACHLOROPHENE₃₅
HYPERSTIMULATED₂₆
HELIOCENTRICITY₂₅
HISTOCOMPATIBLE₂₆
HYPOMAGNESAEMIA₂₈
HALFHEARTEDNESS₂₅
HYPERSALIVATION₂₆

Showing the top 48 of 255 words. See every valid word

All valid words 255

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

HABITABLENESSES₂₂
HAEMACYTOMETERS₂₇
HAEMAGGLUTINATE₂₂
HAEMAGGLUTININS₂₂
HAEMOCYTOMETERS₂₇
HAEMOFLAGELLATE₂₄
HAEMOGLOBINURIA₂₃
HALFHEARTEDNESS₂₅
HALFPENNYWORTHS₃₂
HALLUCINATIONAL₂₀
HALLUCINOGENICS₂₃
HAMAMELIDACEOUS₂₅
HANDLEABILITIES₂₁
HAPHAZARDNESSES₃₃
HARDENABILITIES₂₁
HARDHEARTEDNESS₂₃
HARMONISTICALLY₂₅
HARPSICHORDISTS₂₆
HAZARDOUSNESSES₂₈
HEADMASTERSHIPS₂₆
HEALTHFULNESSES₂₄
HEARTBREAKINGLY₂₈
HEARTBROKENNESS₂₄
HEARTLESSNESSES₁₈
HEARTSICKNESSES₂₄
HEARTSOMENESSES₂₀
HELIOCENTRICISM₂₄
HELIOCENTRICITY₂₅
HELIOMETRICALLY₂₅
HELIOSCIOPHYTES₂₈
HELIOTROPICALLY₂₅
HELMINTHOLOGIES₂₄
HELMINTHOLOGIST₂₄
HEMAGGLUTINATED₂₃
HEMAGGLUTINATES₂₂
HEMATOPORPHYRIN₃₀
HEMICRYPTOPHYTE₃₅
HEMICRYSTALLINE₂₅
HEMISPHERECTOMY₃₂
HEMISPHERICALLY₃₀
HEMOCHROMATOSES₂₇
HEMOCHROMATOSIS₂₇
HEMODYNAMICALLY₃₁
HEMOFLAGELLATES₂₄
HEMOGLOBINURIAS₂₃
HEMOSIDEROSISES₂₁
HENDECASYLLABIC₂₈
HENDECASYLLABLE₂₆
HEPARINISATIONS₂₀
HEPARINIZATIONS₂₉
HEPATICOLOGICAL₂₅
HEPATICOLOGISTS₂₃
HERBIVOROUSNESS₂₃
HEREDITARIANISM₂₁
HEREDITARIANIST₁₉
HERESIOGRAPHERS₂₄
HERESIOGRAPHIES₂₄
HERESTHETICIANS₂₃
HERMAPHRODITISM₂₈
HERMENEUTICALLY₂₅
HERNIORRHAPHIES₂₆
HETEROCERCALITY₂₅
HETEROCHROMATIC₂₇
HETEROCHROMATIN₂₅
HETEROCHRONISMS₂₅
HETERODACTYLOUS₂₄
HETEROFLEXIBLES₃₀
HETEROGENEITIES₁₉
HETEROGENEOUSLY₂₂
HETEROGRAPHICAL₂₆
HETEROMORPHISMS₂₇
HETERONORMATIVE₂₃
HETEROSCEDASTIC₂₃
HETEROSEXUALITY₂₈
HETEROSOCIALITY₂₃
HETEROSTROPHIES₂₃
HETEROTHALLISMS₂₃
HEXACHLORETHANE₃₃
HEXACHLOROPHANE₃₅
HEXACHLOROPHENE₃₅
HEXOSAMINIDASES₂₈
HEXYLRESORCINOL₃₀
HIERACOSPHINGES₂₆
HIERACOSPHINXES₃₂
HIERARCHIZATION₃₂
HIEROGRAMMATIST₂₃
HILARIOUSNESSES₁₈
HISTOCHEMICALLY₃₀
HISTOCOMPATIBLE₂₆
HISTOPATHOLOGIC₂₆
HISTOPHYSIOLOGY₃₀
HISTORICIZATION₂₉
HISTORIOGRAPHER₂₄
HISTORIOGRAPHIC₂₆
HOBBLEDEHOYDOMS₃₂
HOBBLEDEHOYHOOD₃₃
HOBBLEDEHOYISMS₃₁
HOIDENISHNESSES₂₂
HOLOBLASTICALLY₂₅
HOLOCRYSTALLINE₂₃
HOLOGRAPHICALLY₂₉
HOLOMETABOLISMS₂₄
HOMEOPATHICALLY₃₀
HOMOCENTRICALLY₂₇
HOMOCHLAMYDEOUS₃₁
HOMOCHROMATISMS₂₉
HOMOEOMORPHISMS₂₉
HOMOEOTELEUTONS₂₀
HOMOGENEOUSNESS₂₁
HOMOGENISATIONS₂₁
HOMOGENIZATIONS₃₀
HOMOPLASTICALLY₂₇
HOMOSEXUALITIES₂₇
HOMOSOCIALITIES₂₂
HOMOTRANSPLANTS₂₂
HONORABLENESSES₂₀
HORIZONTALITIES₂₇
HORSEFEATHERSES₂₄
HORTICULTURALLY₂₃
HORTICULTURISTS₂₀
HOSPITALISATION₂₀
HOSPITALIZATION₂₉
HOTHEADEDNESSES₂₃
HOUSEHOLDERSHIP₂₇
HOUSELESSNESSES₁₈
HOUSEMISTRESSES₂₀
HOUSEWIFELINESS₂₄
HOYDENISHNESSES₂₅
HUCKLEBERRYINGS₃₀
HUMANITARIANISM₂₂
HUMANITARIANIST₂₀
HUMIDIFICATIONS₂₆
HUMORLESSNESSES₂₀
HYDROBIOLOGICAL₂₇
HYDROBIOLOGISTS₂₅
HYDROCELLULOSES₂₄
HYDROCEPHALUSES₂₉
HYDROCORALLINES₂₄
HYDROCORTISONES₂₄
HYDRODYNAMICIST₃₀
HYDROEXTRACTORS₃₁
HYDROGENISATION₂₃
HYDROGENIZATION₃₂
HYDROGEOLOGICAL₂₆
HYDROGEOLOGISTS₂₄
HYDROMECHANICAL₃₁
HYDROMETALLURGY₂₈
HYDROMETRICALLY₂₉
HYDROPATHICALLY₃₂
HYDROSTATICALLY₂₇
HYDROSULPHUROUS₂₇
HYDROTHERAPISTS₂₇
HYDROTROPICALLY₂₉
HYDROXYAPATITES₃₄
HYDROXYBUTYRATE₃₇
HYDROXYLAPATITE₃₄
HYDROXYPROLINES₃₄
HYETOMETROGRAPH₂₉
HYGROMETRICALLY₂₉
HYGROSCOPICALLY₃₁
HYLOZOISTICALLY₃₅
HYPERACTIVITIES₂₈
HYPERADRENALISM₂₆
HYPERAESTHESIAS₂₆
HYPERAGGRESSIVE₂₈
HYPERCALCAEMIAS₂₉
HYPERCATABOLISM₂₉
HYPERCATALECTIC₂₉
HYPERCOAGULABLE₂₈
HYPERCORRECTION₂₇
HYPERCRITICALLY₃₀
HYPERCRITICISED₂₈
HYPERCRITICISES₂₇
HYPERCRITICISMS₂₉
HYPERCRITICIZED₃₇
HYPERCRITICIZES₃₆
HYPEREFFICIENCY₃₆
HYPERENDEMICITY₃₁
HYPEREXCITEMENT₃₄
HYPEREXCRETIONS₃₂
HYPEREXTENSIBLE₃₂
HYPEREXTENSIONS₃₀
HYPERFASTIDIOUS₂₇
HYPERFEMININITY₃₁
HYPERFUNCTIONAL₂₈
HYPERGLYCAEMIAS₃₁
HYPERHIDROSISES₂₇
HYPERHYDROSISES₃₀
HYPERIMMUNISING₂₈
HYPERIMMUNIZING₃₇
HYPERINFLATIONS₂₆
HYPERINSULINISM₂₅
HYPERINVOLUTION₂₆
HYPERLIPIDAEMIA₂₈
HYPERLIPIDEMIAS₂₈
HYPERMETABOLISM₂₉
HYPERMETROPICAL₂₉
HYPERMOBILITIES₂₇
HYPERMODERNISMS₂₈
HYPERMODERNISTS₂₆
HYPERMUTABILITY₃₀
HYPERNATRAEMIAS₂₅
HYPERPARASITISM₂₇
HYPERPHYSICALLY₃₆
HYPERPOLARISING₂₆
HYPERPOLARIZING₃₅
HYPERPRODUCTION₂₈
HYPERPRODUCTIVE₃₁
HYPERREACTIVITY₃₁
HYPERRESPONSIVE₂₈
HYPERSALINITIES₂₃
HYPERSALIVATION₂₆
HYPERSECRETIONS₂₅
HYPERSENSITISED₂₄
HYPERSENSITISES₂₃
HYPERSENSITIZED₃₃
HYPERSENSITIZES₃₂
HYPERSOMNOLENCE₂₇
HYPERSTIMULATED₂₆
HYPERSTIMULATES₂₅
HYPERTHYROIDISM₃₂
HYPERTONICITIES₂₅
HYPERVELOCITIES₂₈
HYPERVENTILATED₂₇
HYPERVENTILATES₂₆
HYPERVIGILANCES₂₉
HYPERVIRULENCES₂₈
HYPNOTHERAPISTS₂₈
HYPNOTISABILITY₂₈
HYPNOTIZABILITY₃₇
HYPOCHONDRIACAL₃₁
HYPOCHONDRIASES₂₉
HYPOCHONDRIASIS₂₉
HYPOCHONDRIASMS₃₁
HYPOCHONDRIASTS₂₉
HYPOCRYSTALLINE₂₈
HYPOMAGNESAEMIA₂₈
HYPOMAGNESEMIAS₂₈
HYPOMENORRHOEAS₂₈
HYPOPHOSPHOROUS₃₃
HYPOPITUITARISM₂₇
HYPOSENSITISING₂₄
HYPOSENSITIZING₃₃
HYPOSTASISATION₂₃
HYPOSTASIZATION₃₂
HYPOSTATISATION₂₃
HYPOSTATIZATION₃₂
HYPOTHYROIDISMS₃₂
HYPOVENTILATION₂₆
HYPSOMETRICALLY₃₀
HYSTERECTOMISED₂₆
HYSTERECTOMISES₂₅
HYSTERECTOMIZED₃₅
HYSTERECTOMIZES₃₄
HYSTRICOMORPHIC₃₂

Letters by positionIn 48% of these words the 15th letter is S.

2nd letter

Y48%
E25%
O13%

3rd letter

P37%
M12%
D9%

4th letter

E35%
O18%
R14%

5th letter

R35%
O19%
E7%

13th letter

I31%
S21%
L9%

15th letter

S48%
Y15%
E8%

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses

Score spreadMost of these words score 28 in Scrabble; HYDROXYBUTYRATE tops the list with 37. Scores before board bonuses.

1818 points: 3 words
19 points: 2 words
2020 points: 10 words
21 points: 6 words
2222 points: 9 words
23 points: 22 words
2424 points: 21 words
25 points: 21 words
2626 points: 22 words
27 points: 24 words
2828 points: 27 words
29 points: 21 words
3030 points: 15 words
31 points: 13 words
3232 points: 15 words
33 points: 6 words
3434 points: 5 words
35 points: 6 words
3636 points: 3 words
37 points: 4 words

Word	Scrabble	Words With Friends	Dictionaries
HYDROXYBUTYRATE	37	35	Collins only
HYPERIMMUNIZING	37	42	All three
HYPNOTIZABILITY	37	38	All three
HYPERCRITICIZED	37	38	Collins only
HYPERCRITICIZES	36	37	Collins only
HYPERPHYSICALLY	36	36	Collins · NWL
HYPEREFFICIENCY	36	37	NWL only
HYPERPOLARIZING	35	38	All three
HEXACHLOROPHENE	35	36	All three
HYSTERECTOMIZED	35	35	All three
HEMICRYPTOPHYTE	35	35	Collins only
HEXACHLOROPHANE	35	36	Collins only

Exactly 255 fifteen-letter entries begin with H, yet none fall in the common-word group. The set mixes familiar-looking forms such as hospitalization and humanitarianism with technical terms like hydroxybutyrate. Dictionary coverage varies: Collins contains 235, NWL2023 contains 165, and ENABLE contains 126, so a tournament game's accepted list matters.

What stands out in this H list?

255 entries start with H, but none meet the common-word cutoff.
198 entries have definitions recorded.
S is the most frequent ending, appearing on 123 words.
Four words share the highest score of 37.
Collins includes 235 entries; NWL2023 includes 165; ENABLE includes 126.

Which endings dominate among H starters?

The most frequent final letter is S: 123 H starters end that way. Y follows with 39, while E and N account for 20 and 17. When a pattern leaves the last tile open, test S first, then Y, instead of scanning every possible ending.

Horticulturists and heterogeneities both finish in S. Heterosexuality and hypopituitarism end in Y and M respectively; only 11 entries end in M. These examples narrow a pattern search without assuming every unfamiliar H word is playable.

Which H words lead on score?

The top score is 37, shared by hydroxybutyrate, hyperimmunizing, hypnotizability, and hypercriticized. Their unusual letter combinations drive the total. Hydroxybutyrate is worth checking when high-value tiles are available, though finding room for a fifteen-letter play is a separate challenge.

The main limitation is familiarity: the common-word count is zero, even though 198 entries have definitions. Dictionary totals overlap rather than add into one accepted list. Collins has 235 entries, NWL2023 has 165, and ENABLE has 126; check your game's word list before building a play around a technical term.

How does the count change at nearby lengths?

For 15-letter words starting with H, the count is 255, compared with 419 fourteen-letter H starters. The same-letter list reaches 1,477 at nine letters before shrinking at longer lengths. If your rack or puzzle pattern permits one fewer tile, compare the fourteen-letter set first; it has 164 more entries to consider.

Questions people ask

Are 15-letter words starting with H common?

No; none meet the common-word cutoff. The examples range from hospitalization and humanitarianism to technical terms such as hemochromatosis. Although 198 entries have definitions recorded, many are specialized forms, so familiarity alone is not a reliable guide to whether a game accepts one.

Which 15-letter H word scores the most?

Four entries share the highest score of 37: hydroxybutyrate, hyperimmunizing, hypnotizability, and hypercriticized. Each has a demanding letter mix, so the score is only one part of the play; you still need a legal board fit and the right tiles.

How many of these words are in Collins and NWL2023?

Collins includes 235 of the entries, while NWL2023 includes 165. Those counts describe separate dictionary coverage, not exclusive groups, so they should not be added together. Confirm the word in the specific tournament list your game uses before playing it.

Keep going

Related lists

14-letter words start with H

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