Countable Nouns Ending in UM and Containing ER

Explore 202 verified English countable nouns ending in UM and containing ER, including Referendum, Serum, Bacterium, Geranium, Sternum, Cerebellum and Cerebrum. Browse these count nouns with singular and plural forms below, or review singular and plural count rules in our noun grammar guide.

Refine list...
JUMP:
Sort:
Group:
Case:
View:
JUMP TO:
Select any word to view available definitions & photosSelect any word for details
Starts with A
14 words
antiserum
ageratum
antheridium
apodyterium
archaebacterium
aspergillum
aerarium
aspersorium
acroterium
apterium
aeroperitoneum
anoplotherium
aerobium
anaerobium
Starts with B
2 words
bacterium
brontotherium
Starts with C
24 words
cerebellum
cerebrum
criterium
cyanobacterium
conservatorium
corynebacterium
cinerarium
ceratium
clerodendrum
closterium
ceratotherium
clavicytherium
cerastium
clerum
cercidiphyllum
cercidium
chylopericardium
cerithium
cheirotherium
chiropterygium
ceramium
ceratopetalum
ceratophyllum
chalicotherium
Starts with D
6 words
diverticulum
desideratum
deinotherium
desiderium
dinotherium
dertrum
Starts with E
24 words
erratum
eryngium
erechtheum
enterobacterium
erythroxylum
eubacterium
ergastulum
elotherium
erythronium
erineum
episternum
ensisternum
excerptum
eriogonum
erodium
erysimum
endoperidium
eranthemum
ervum
eriophorum
eriophyllum
exoperidium
endarterium
entosternum
Starts with F
2 words
fermentum
feretrum
Starts with G
3 words
geranium
gubernaculum
gatherum
Starts with H
9 words
herbarium
hypericum
hibernaculum
hydropericardium
hyracotherium
hesperidium
hieracium
hematopericardium
hydropneumopericardium
Starts with I
7 words
interregnum
imperium
intermedium
interambulacrum
intervallum
interministerium
ichthyopterygium
Starts with L
5 words
leptospermum
lithospermum
leucospermum
lectisternium
laserpicium
Starts with M
7 words
magisterium
meerschaum
mycobacterium
megatherium
ministerium
mezereum
menispermum
Starts with N
5 words
nerium
nanobacterium
nitrobacterium
nitrosobacterium
nototherium
Starts with O
3 words
operculum
osteospermum
osmeterium
Starts with P
24 words
perineum
peritoneum
pericardium
periosteum
propionibacterium
pterygium
puerperium
perpetuum
perichondrium
pericranium
perimysium
pomerium
presternum
pneumoperitoneum
psalterium
peridium
perineurium
perionychium
perithecium
pneumopericardium
periostracum
peridinium
prosternum
perigonium
Starts with R
1 words
referendum
Starts with S
23 words
serum
sternum
superpremium
superstratum
spermatogonium
sempervivum
superphylum
severum
sclerotium
sestertium
sacerdotium
spermarium
spermogonium
spermatium
supernaculum
spermatovum
sivatherium
samotherium
suboperculum
sphaeridium
spermatangium
scelidotherium
sericterium
Starts with T
8 words
terrarium
tergum
tertium
termitarium
tuberculum
trachelospermum
tripleurospermum
tritocerebrum
Starts with U
2 words
understratum
uintatherium
Starts with V
5 words
verticillium
veratrum
verbascum
veronicastrum
verumontanum
Starts with X
5 words
xiphisternum
xiphosternum
xeranthemum
xerophyllum
xeromyrum
Starts with Z
1 words
zoospermium

•Browse Countable Nouns by Letter (A to Z)

Select an ending 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.