Countable Nouns Starting with R and Containing OS

Browse 124 valid English countable nouns starting with R and containing OS, from Roster, Repository, Retrospective, Rooster, Rosemary, Rosary and Retrospect 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 RA8 words
rallycross
radiosensitivity
radiosonde
radioscopy
radiosterilization
radiostrontium
radioscope
ramosity
Starts with RE24 words
repository
retrospective
retrospect
repost
reposition
repossession
religiosity
retrospection
rehospitalization
reposado
reexposure
reimposition
redeposit
restenosis
recomposition
reprosecution
repossessor
reredos
reposer
retrotransposon
reposal
redeposition
retinoscope
resectoscope
Starts with RH17 words
rhinoceros
rheostat
rhizosphere
rhabdomyosarcoma
rhodochrosite
rhynchosaur
rhinoscopy
rhinoscope
rhinolaryngoscope
rhodotypos
rhenosterbos
rhinoscleroma
rhombos
rheoscope
rhynchospora
rhynchosporium
rhabdosphere
Starts with RI4 words
ribosome
riposte
ringtoss
ribonucleoside
Starts with RO24 words
roster
rooster
rosemary
rosa
rosary
roost
rosette
rosewood
rosebush
rosebud
rostrum
rosin
rooibos
rosewater
roscoe
rosella
rostral
rosaline
rotoscope
rosti
roselle
rosebed
roshi
rosser
Starts with RU3 words
rugosity
rudderpost
rugosa

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