9 Letter Countable Nouns Ending in IUM

Browse 119 valid English 9 letter countable nouns that end with IUM, from Symposium, Gymnasium, Bacterium, Palladium, Terrarium, Harmonium and Euphonium to rarer terms. Check definitions and spelling below, or visit our noun grammar guide to review singular and plural count rules.

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Starts with A
5 words
anthurium
arbitrium
asplenium
anthodium
aethalium
Starts with B
6 words
bacterium
bucranium
bullarium
bronchium
bromatium
botrydium
Starts with C
24 words
collegium
cymbidium
criterium
calvarium
colluvium
caldarium
collyrium
coenobium
ctenidium
carbonium
coccidium
cavaedium
contagium
cerastium
cyrtomium
cystidium
cercidium
choragium
cerithium
climacium
chilidium
cormidium
coelarium
chilarium
Starts with D
9 words
decennium
dentalium
diazonium
deliquium
desmodium
dichasium
diclesium
desmidium
drepanium
Starts with E
15 words
euphonium
effluvium
epimedium
epimysium
epicedium
epilobium
excambium
endangium
epipodium
epitonium
ephippium
encarpium
ephymnium
embaphium
exogonium
Starts with F
3 words
fastigium
fastidium
farfugium
Starts with G
3 words
gymnasium
gynoecium
gelsemium
Starts with H
6 words
harmonium
herbarium
hospitium
hydronium
hieracium
hedychium
Starts with I
1 words
impluvium
Starts with M
6 words
manubrium
marsupium
marrubium
mortarium
martyrium
mazaedium
Starts with N
3 words
nitronium
nelumbium
nitrenium
Starts with P
7 words
palladium
presidium
pterygium
pollinium
pastorium
purdonium
pycnidium
Starts with R
3 words
rhizobium
reptilium
rhipidium
Starts with S
14 words
symposium
syncytium
sensorium
syngonium
sacrarium
sexennium
sulfonium
sympodium
synedrium
septarium
siphonium
sporidium
stylidium
synangium
Starts with T
7 words
terrarium
trapezium
tentorium
triennium
triforium
trifolium
tripudium
Starts with U
2 words
uropygium
uredinium
Starts with V
2 words
vaccinium
vestigium
Starts with Z
1 words
zoocytium

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