21 Letter Words with IS

Browse 32 verified English 21 letter words containing IS, including Otorhinolaryngologist, Counterreconnaissance, Establishmentarianism, Immunoelectrophoresis, Pseudohermaphroditism, Indistinguishableness and Anticonstitutionalist. Validated against official game lexicons for Scrabble, Wordle, crosswords, and daily writing, explore definitions and letter counts below.

Playing a word game? Score tiles & test blanks
Word Finder
Refine list...
JUMP:
Sort:
Group:
Case:
View:
JUMP TO:
Select any word to view available definitions & photosSelect any word for details
Starts with A6 words
anticonstitutionalist
anticonstitutionalism
antisupernaturalistic
antimaterialistically
anthropoclimatologist
antinationalistically
Starts with B
1 words
ballistocardiographic
Starts with C
1 words
counterreconnaissance
Starts with D
2 words
disestablishmentarian
disproportionableness
Starts with E
1 words
establishmentarianism
Starts with H
2 words
historicogeographical
hypsidolichocephalism
Starts with I4 words
immunoelectrophoresis
indistinguishableness
intellectualistically
isopropylideneacetone
Starts with M
2 words
mucopolysaccharidosis
microseismometrograph
Starts with N
1 words
noncharacteristically
Starts with O
1 words
otorhinolaryngologist
Starts with P5 words
pseudohermaphroditism
poliencephalomyelitis
pseudoparthenogenesis
poluphloisboiotatotic
pseudoanachronistical
Starts with R
1 words
representationalistic
Starts with S
2 words
scleroticochoroiditis
scientificohistorical
Starts with U
2 words
undistinguishableness
ureteropyelonephritis
Starts with Z
1 words
zygomaticoauricularis

•Browse Words by Letter (A to Z)

Select a letter to browse words containing it
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWordsVocabulary HubPositive WordsNegative Words
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.