Countable Nouns Starting with O and Containing RA

This list gathers 176 English countable nouns starting with O and containing RA, such as Operation, Overall, Orange, Operator, Opera, Oral and Outrage. 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 OB12 words
obliteration
obscuration
obscura
obscurantist
obturator
obliterator
obturation
obscurant
obsecration
obduration
obumbration
objuration
Starts with OC3 words
oceanographer
ochlocracy
ochlocrat
Starts with OD5 words
odorant
odontograph
odograph
odontography
odontophoran
Starts with OE
1 words
oenothera
Starts with OF
1 words
offramp
Starts with OK
1 words
okra
Starts with OL6 words
olecranon
oleography
oleothorax
oleograph
olecranarthritis
oleorefractometer
Starts with OM3 words
omeprazole
omnirange
omrah
Starts with ON4 words
onagra
ondatra
onychophoran
ondograph
Starts with OP20 words
operation
operator
opera
operative
operand
operant
operagoer
operatorship
operationalist
operativity
operationist
ophiura
opisthobranch
opisthograph
opisthography
ophiuran
opisthobranchiate
operatrix
oppignoration
oppigneration
Starts with OR24 words
orange
oral
orchestra
oracle
orchestration
orator
oratory
oration
orthography
orchestrator
orangutan
orangeade
oratorio
orang
orality
orangery
orchardgrass
oranda
organigram
orach
oratorian
organogram
orthopraxy
orache
Starts with OS14 words
ostracism
osetra
ostracod
ostracon
ossetra
oscillograph
ostracizer
ostracoderm
ossifrage
oscillogram
ostracodan
osteography
ossifraga
ostracean
Starts with OU6 words
outrage
outmigration
outtrade
outmigrant
ouvrage
ouvirandra
Starts with OV24 words
overall
overalls
overdraft
overabundance
overachiever
overdraw
overconcentration
overactivity
overage
overachievement
overgeneralization
overanalysis
overarm
overspray
overstrain
overarousal
overdecoration
overpreparation
overwrap
overaction
overelaboration
overanxiety
overcentralization
overinsurance
Starts with OX3 words
oxytetracycline
oxyanthraquinone
oxylabrax

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