Collective Nouns That Start with O

Explore 43 verified English collective nouns starting with O, including Old, Order, Organization, Opposition, Offense, Outfit and Orchestra. Browse these group nouns for flocks, herds, and collections by length below, or check subject-verb agreement rules for groups in our noun grammar guide.

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Starts with OA
1 words
oarage
Starts with OC5 words
octet
octad
octonary
octarchy
octuor
Starts with OD
2 words
odawa
odontornithes
Starts with OE
1 words
oeuvre
Starts with OF5 words
offense
offspring
officialdom
offscum
officiary
Starts with OG
1 words
ogdoad
Starts with OL3 words
old
oligarchy
oligodendroglia
Starts with OM4 words
omniana
omnivora
omlah
omrah
Starts with OP3 words
opposition
oppressed
optimates
Starts with OR8 words
order
organization
orchestra
orchard
orientalia
ornis
oranese
ornithocephalidae
Starts with OS
1 words
osteoglossiformes
Starts with OT
1 words
oto
Starts with OU6 words
outfit
outfield
outgroup
outcrowd
outguard
outrigging
Starts with OV
2 words
overclass
overmultitude

•Browse Collective Nouns by Letter (A to Z)

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