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Words ending with UM (9-letter)

A curated list of 9-letter words tailored to this exact pattern. Endings like UM often mark word families—helpful to confirm tense or morphology. For example: aluminium, americium, anthodium.

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122 words
Word Definition Length Syllables
aluminium94
americium94
anthodium93
anthurium93
antiserum94
arboretum94
asphaltum93
athenaeum93
bacterium93
berkelium93
beryllium93
botulinum94
bronchium92
bubblegum93
calcaneum93
caldarium93
calvarium93
capitulum94
castoreum93
claustrum92
clitellum93
coccidium93
colchicum93
collegium93
colluvium93
collyrium93
colosseum93
colostrum93
columbium93
contagium93
continuum93
conundrum93
credendum93
criterium93
ctenidium93
cubiculum94
cymbidium93
decennium93
dentalium93
deuterium93
diazonium93
dichasium93
doronicum94
effluvium93
endosteum93
epicedium94
epimysium94
equisetum94
euphonium93
flabellum93
flagellum93
gelsemium93
germanium93
gymnasium93
gynaeceum93
gynaecium93
gynoecium93
harmonium93
herbarium93
hospitium93
hydronium93
indecorum94
lanthanum93
magnesium93
manubrium93
marsupium93
mausoleum93
mazaedium93
menstruum92
neodymium93
neptunium93
operculum94
opusculum94
palladium93
paramylum94
petroleum93
plutonium93
pollinium93
polygonum94
potassium93
practicum93
presidium93
pterygium93
pycnidium93
pyrethrum93
reptilium93
responsum93
reticulum94
rhizobium93
rostellum93
ruthenium93
sacrarium93
sargassum93
sarmentum93
scutellum93
sensillum93
sensorium93
septarium93
spirillum93
stomodeum93
strontium92
subphylum93
sugarplum93
sulfonium93
sympodium93
symposium93
syncytium93
tegmentum93
tellurium93
tenaculum94
terrarium93
trapezium93
triennium92
trifolium93
triforium93
ultimatum94
unguentum93
uredinium94
uropygium94
vestigium93
ytterbium93
zirconium93

FAQs

What’s typical about UM-ending words?
UM often marks suffix families; think about derivatives when guessing.

Do you include UK/US spellings?
Where they exist, both may appear.