Countable Nouns Ending in UM and Containing OP

This list gathers 75 English countable nouns ending in UM and containing OP, such as Optimum, Opossum, Poppadum, Operculum, Suboptimum, Lycopodium and Loropetalum. Use the sorting controls below to organize entries by length, or consult our noun grammar guide to review singular and plural count rules.

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Starts with A
4 words
aeroperitoneum
androphorum
aegopodium
anoplotherium
Starts with B
2 words
bulbophyllum
bryophyllum
Starts with C
14 words
chlorophytum
cocoplum
chenopodium
chiropatagium
caulophyllum
cheiropatagium
chylopericardium
chiropterygium
ceratopetalum
ceratophyllum
cladophyllum
clinopodium
cheiropterygium
chartophylacium
Starts with E
5 words
endoperidium
eriophorum
eriophyllum
exoperidium
endophyllum
Starts with F
1 words
filopodium
Starts with G
1 words
graptopetalum
Starts with H
4 words
heliotropium
hydropericardium
hematopericardium
hydropneumopericardium
Starts with I
1 words
ichthyopterygium
Starts with L
5 words
lycopodium
loropetalum
leontopodium
lobopodium
leucophyllum
Starts with M
2 words
monopodium
macrophylum
Starts with O
8 words
optimum
opossum
operculum
oppidum
opusculum
opsonium
ophidiarium
ophthalmophyllum
Starts with P
15 words
poppadum
propionibacterium
pseudopodium
pneumoperitoneum
paphiopedilum
pneumopericardium
podophyllum
proprium
propylaeum
propodeum
propagulum
pleuroperitoneum
pneumohydropericardium
pseudoplasmodium
pyopneumopericardium
Starts with S
7 words
suboptimum
scolopendrium
schizophyllum
stylopodium
stylophorum
suboperculum
sceuophylacium
Starts with T
1 words
tropaeolum
Starts with U
1 words
uropygium
Starts with X
2 words
xerophyllum
xenophyum
Starts with Z
2 words
zygopetalum
zygophyllum

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