5 Letter Countable Nouns Starting with O

Browse 104 valid English 5 letter countable nouns that start with O, from Order, Offer, Owner, Ocean, Organ, Outer and Onion 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 OA
2 words
oasis
oater
Starts with OB
1 words
objet
Starts with OC8 words
ocean
octet
ocher
octyl
ocker
ocrea
octad
ochna
Starts with OD4 words
odeon
odeum
odawa
odist
Starts with OF3 words
offer
offie
oflag
Starts with OG3 words
ogive
ogham
ogler
Starts with OI
1 words
oiler
Starts with OJ
1 words
ojime
Starts with OK
1 words
okapi
Starts with OL6 words
olive
oldie
ollie
oligo
ology
olein
Starts with OM6 words
omega
omani
ombre
omija
omlah
omrah
Starts with ON6 words
onion
onset
oncer
onlay
onium
oncus
Starts with OO
2 words
ootid
oobit
Starts with OP5 words
opera
optic
opsin
opter
opepe
Starts with OR19 words
order
organ
orbit
ortho
orang
orris
oriel
oread
ormer
orach
oribi
orlop
orgia
ornis
orval
orant
orgue
orcin
ortyx
Starts with OS4 words
ostia
osier
ossia
oshac
Starts with OT4 words
other
otter
otaku
otary
Starts with OU10 words
ought
outer
ounce
outro
ouija
outgo
outie
ouzel
oubit
ouphe
Starts with OV6 words
ovary
ovoid
ovine
ovate
ovolo
ovist
Starts with OW4 words
owner
owens
owlet
owler
Starts with OX6 words
oxide
oxbow
oxeye
oxter
oxlip
oxime
Starts with OZ
2 words
ozark
ozeki

•Browse Countable Nouns by Letter (A to Z)

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ABCDEFGHIJKLMNOPQRSTUVWXYZ
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