Countable Nouns Starting with O and Containing U
Browse 443 valid English countable nouns starting with O and containing U, from Opportunity, Outcome, Output, Occupation, Outer, Outline and Occurrence 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
1 words oasthouse
Starts with OB24 words
obstruction
obscurity
obituary
oblique
obfuscation
obstructionist
obsequies
obscuration
obscura
obloquy
obscurantist
obliquity
obtrusion
obturator
obituarist
obstruent
obstructor
obtusity
obscurement
obsequy
obturation
obelus
objurgation
obtundent
Starts with OC24 words
occupation
occurrence
occupancy
occupant
octopus
ocular
occupier
occlusion
occultist
oculus
occultation
oculist
octuple
occlusive
oculomotor
occluder
octuplet
occiput
oceanarium
occupance
ocellus
ocularist
occulter
oceanaut
Starts with OD3 words
odalisque
odeum
odontoglossum
Starts with OE
1 words oeuvre
Starts with OF4 words
offput
offcut
offcutter
offscouring
Starts with OI3 words
oidium
oilcup
oilnut
Starts with OL5 words
oligonucleotide
olinguito
oldsquaw
ololiuqui
olluco
Starts with OM14 words
ombudsman
omnibus
ombudsperson
omnium
omentum
ombuds
omnisexual
omasum
ommatidium
omusubi
ombu
omadhaun
omdurmani
ommateum
Starts with ON11 words
onslaught
onus
onrush
oncovirus
onium
oncidium
oncomouse
oncornavirus
onychium
onocentaur
oncus
Starts with OO
1 words oogonium
Starts with OP24 words
opportunity
opaque
optimum
opus
opportunist
opossum
operculum
oppidum
opercular
optocoupler
opuntia
oppugnancy
opuscule
opusculum
oppugner
ophiura
ophiurid
opinicus
oppugnant
opercule
ophiuroid
opulus
ophiuran
opisthopulmonate
Starts with OQ
1 words oquassa
Starts with OR24 words
orangutan
organum
organophosphorus
orbicularis
origanum
orotundity
ornithorhynchus
ornithogalum
orthomyxovirus
organomercurial
orangequat
orarium
ornithomimosaur
ortanique
oracularity
organistrum
orgue
orthocousin
orangequit
orontium
orihau
ornithosaur
ordalium
orthobenzoquinone
Starts with OS20 words
ossuary
ossobuco
osmanthus
ostium
osculation
osmund
osculum
osculatory
oscule
osnaburg
ossature
osmiridium
ostensorium
osmunda
osteospermum
ossarium
osmeterium
osteoglossum
osculatrix
ostreiculturist
Starts with OT3 words
otaku
otocinclus
otterhound
Starts with OU24 words
out
outside
ought
outcome
output
outer
outline
outfit
outlet
outlook
outrage
ounce
outsider
outreach
outbreak
outward
outgoing
ouch
outlaw
outage
outing
outskirts
outset
outcast
Starts with OV24 words
overturn
overhaul
overture
overrun
ovulation
overground
ovum
overabundance
overproduction
overexposure
oversupply
overburden
overindulgence
overdub
overvaluation
overcount
oviduct
overpressure
overregulation
oversubscription
overplus
overthrust
overtrousers
overutilization
Starts with OW
1 words owerloup
Starts with OX6 words
oxtongue
oxidoreductase
oxonium
oxypetalum
oxysulfide
oxyanthraquinone
Starts with OZ
1 words ozothamnus