Countable Nouns Starting with I and Containing UM

This list gathers 62 English countable nouns starting with I and containing UM, such as Instrument, Instrumental, Incumbent, Illumination, Incumbency, Inhumanity and Instrumentation. Use the sorting controls below to organize entries by length, or consult our noun grammar guide to review singular and plural count rules.

Refine list...
JUMP:
Sort:
Group:
Case:
View:
JUMP TO:
Select any word to view available definitions & photosSelect any word for details
Starts with IC
2 words
ichneumon
ichthyopterygium
Starts with ID
2 words
idolum
ideatum
Starts with IG
1 words
ignotum
Starts with IL12 words
illumination
illuminati
illuminator
ileum
ilium
illuminance
illuminant
illuminist
illuminato
illuvium
illicium
illuminer
Starts with IM6 words
imperium
impostume
impluvium
imposthume
impostumation
imposthumation
Starts with IN24 words
instrument
instrumental
incumbent
incumbency
inhumanity
instrumentation
instrumentality
instrumentalist
interregnum
infimum
innumerate
inoculum
integument
indecorum
intumescent
inhumation
infundibulum
incunabulum
indicium
insectarium
intumescence
intercolumniation
intermedium
indusium
Starts with IS
1 words
ischium
Starts with IT
1 words
itacolumite

•Browse Countable Nouns by Letter (A to Z)

Select a starting letter to browse countable nouns
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.