Countable Nouns Starting with C and Containing OS

Browse 464 valid English countable nouns starting with C and containing OS, from Close, Cost, Cross, Closer, Closing, Closet and Composition 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 CA20 words
caboose
calvados
calaboose
callosity
carnosaur
callosum
catholicos
carcinomatosis
catostomus
carcinosarcoma
carpospore
carnosity
catostomid
cargoose
cardiosphygmograph
caliginosity
cardiosphygmogram
caseose
catostomoid
caulosarc
Starts with CE24 words
cephalosporin
cellulosic
centrosome
celosia
centrosymmetry
ceratosaur
certosa
cerebroside
cecostomy
cephalosporium
centrosphere
celioscope
celioscopy
cercospora
cetiosaurian
centrosema
cerebrosis
cenospecies
ceratoglossus
celiosalpingectomy
cenosite
ceratostigma
celoscope
cercosporella
Starts with CH24 words
chromosome
chinos
chooser
chiaroscuro
chromosphere
chemosensitivity
christos
chondromatosis
chondrosarcoma
chymosin
chemosis
chaparejos
chemostat
chamosite
chlamydosaurus
cholecystgastrostomy
chronoscope
cheilosis
cholecystojejunostomy
cholecystostomy
chondrostean
chromoscope
chemosurgery
chalkos
Starts with CI3 words
cirrhosis
cirrostratus
circumposition
Starts with CL22 words
close
closer
closing
closet
closure
closeup
closeout
clostridium
closedown
closetful
clubmoss
cladosporium
closestool
closterium
clinostat
closewing
clostridian
closemouth
clasmatosis
closecross
clinospore
closehead
Starts with CN3 words
cnidosac
cnidoscolus
cnidosis
Starts with CO24 words
cost
composition
costume
cosmetic
cosmetics
composer
composite
cosmos
compost
cosmopolitan
cosplay
cosine
cos
costing
corrosive
colonoscopy
colosseum
cohost
colossus
compostable
colossians
cosmology
corticosteroid
costar
Starts with CR24 words
cross
crossing
crossroads
crossover
crossword
crosswalk
crossfire
crossbow
crisscross
crosshairs
crosshair
crossroad
crossbar
crosswind
crostini
crossbones
crossbreed
crossbred
crosscurrent
crosscut
crossrail
crossbench
crosscheck
crosser
Starts with CU4 words
curiosity
custos
cumulostratus
cuckooshrike
Starts with CY24 words
cyanosis
cytoskeleton
cyclocross
cytosol
cynosure
cystoscopy
cyclophosphamide
cyclospora
cysticercosis
cytostatic
cystoscope
cyclosportive
cyclostyle
cyclostoma
cynoglossum
cyclotosaurus
cytosome
cystostomy
cyclosilicate
cyclostome
cymoscope
cycloscope
cytodiagnosis
cyclosorus

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