Uncountable Nouns That Start with OP

Find 113 valid English uncountable nouns starting with OP, including Open, Operation, Opportunity, Opinion, Option, Operating and Opening. Check definitions and usage below, or visit our noun grammar guide to check quantifier and measurement rules.

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Starts with OP
1 words
op
Starts with OPA7 words
opaque
opacity
opal
opaqueness
opalescence
opaline
opacification
Starts with OPE24 words
open
operation
operating
opening
opera
openness
openmindedness
operetta
operability
operatics
openwork
openside
openendedness
openheartedness
operatorship
operagoing
operationalism
openhandedness
operativeness
operativity
openability
operationism
operosity
opepe
Starts with OPH24 words
ophthalmology
ophidiophobia
ophthalmia
ophthalmoscopy
ophiology
ophthalmoplegia
ophite
ophthalmitis
ophiophilia
ophthalmometry
ophiolatry
ophthalmotonometry
ophthalmomycosis
ophicalcite
ophthalmodiagnosis
ophthalmomyositis
ophthalmoneuritis
ophthalmoblennorrhea
ophthalmocarcinoma
ophthalmophobia
ophthalmophthisis
ophidiobatrachia
ophthalmomyotomy
ophthalmorrhexis
Starts with OPI10 words
opinion
opium
opinionativeness
opinionatedness
opisthotonos
opisthotonus
opiumism
opisthography
opisthognathism
opisthognathidae
Starts with OPO6 words
opoponax
opobalsam
opotherapy
opodeldoc
opopanax
oporice
Starts with OPP16 words
opportunity
opposition
oppression
opportunism
opprobrium
oppressiveness
oppositeness
opportuneness
oppugnancy
opposability
opponency
oppositionism
opprobriousness
oppilation
oppignoration
oppigneration
Starts with OPS5 words
opsin
opsonization
opsimathy
opsonification
opsonium
Starts with OPT13 words
option
optimization
optimism
optics
optometry
optimality
optionality
optoelectronics
optogenetics
optative
optronics
optology
optimisticalness
Starts with OPU
1 words
opulence

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