Countable Nouns Ending in A and Containing OS

This list gathers 169 English countable nouns ending in A and containing OS, such as Mimosa, Samosa, Tostada, Hosanna, Ambrosia, Costa and Mucosa. 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 A
18 words
ambrosia
angostura
appaloosa
angiosarcoma
agnosia
autostrada
amargosa
ankyloglossia
amorosa
ankylostoma
adenosarcoma
afrormosia
agrostemma
adenostoma
angiomyosarcoma
adenomyxosarcoma
adenomyosarcoma
adenochondrosarcoma
Starts with B
3 words
bosna
blepharosynechia
bromidrosiphobia
Starts with C
24 words
costa
cyclospora
crostata
chondrosarcoma
crocosmia
celosia
certosa
cyclostoma
coscoroba
cosmea
crossandra
carcinosarcoma
cosmorama
crassostrea
coprosma
cercospora
chondromyxosarcoma
centrosema
cystadenosarcoma
chastacosta
ceratostigma
crossopodia
crossosoma
chalcostigma
Starts with D
8 words
dosa
drosophila
dosha
doosra
diglossia
drosera
delosperma
dermatosiophobia
Starts with E
10 words
eosinophilia
eosophobia
eriosoma
endostoma
endosteoma
exostema
exostra
emboscata
eucosia
eriglossa
Starts with F
5 words
fossa
fibrosarcoma
frontosa
fossula
fibromyxosarcoma
Starts with G
4 words
glossa
glossina
gloriosa
gospoda
Starts with H
4 words
hosanna
hosta
hydrosoma
hymenospora
Starts with I
1 words
idioglossia
Starts with J
1 words
jaborosa
Starts with L
1 words
lymphosarcoma
Starts with M
7 words
mimosa
mucosa
mariposa
matryoshka
margosa
myxofibrosarcoma
myxochondrosarcoma
Starts with N
4 words
neurospora
nosema
nosophobia
nosocomephobia
Starts with O
16 words
osteosarcoma
osteria
ostia
osetra
osteoma
ossia
ossetra
osmophobia
opisthosoma
osmunda
osteochondrosarcoma
ossifraga
ostrowskia
osteoenchondroma
osteochondrofibroma
osteoencephaloma
Starts with P
18 words
ponderosa
posada
proboscidea
palmarosa
prosoma
prosopopoeia
pomarrosa
postcava
prosenchyma
paraglossa
pyrostegia
prostanthera
proseucha
prosoponeuralgia
physostegia
pharyngoscleroma
plasmosoma
pseudoscarlatina
Starts with R
12 words
rosa
rosella
rhabdomyosarcoma
rosalia
rugosa
roosa
rosula
rosticceria
rhinoscleroma
roscoea
retinospora
rhynchospora
Starts with S
17 words
samosa
serosa
scabiosa
submucosa
schistosoma
sosia
starosta
streptosepticemia
subcosta
siphonostomata
schistosomia
siphonostoma
sarcostemma
schistoglossia
salpingostenochoria
sarcosoma
sorosporella
Starts with T
3 words
tostada
tosa
tephrosia
Starts with V
1 words
virtuosa
Starts with X
3 words
xylosma
xanthosoma
xylostroma
Starts with Z
1 words
zostera

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