Words Ending in R and Containing OS

Discover 298 playable English words ending in R and containing OS, from Closer, Loser, Poster, Foster, Prosecutor, Dinosaur and Roster to rarer plays. Each entry is verified for Scrabble, Wordle, crosswords, and daily writing, complete with letter counts and meanings below.

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Starts with A
10 words
anteroposterior
ankylosaur
allosaur
archosaur
autosampler
apatosaur
aetosaur
amphiprostylar
apposer
abdominoposterior
Starts with B
13 words
booster
biosensor
biosimilar
brownnoser
brontosaur
brachiosaur
billposter
bioprospector
bosker
boshter
barosaur
bosdalafossur
brosier
Starts with C
24 words
closer
composer
crossover
crosshair
costar
cosponsor
cosplayer
cosigner
crossbar
composter
chooser
costumer
compositor
crosser
crossbencher
crosier
crossmember
costermonger
coster
carnosaur
costumier
crossbearer
cocomposer
coelurosaur
Starts with D
16 words
dinosaur
dossier
depositor
decomposer
defroster
dosser
disposer
dosimeter
discloser
deposer
dispossessor
doser
dispositor
dromaeosaur
drosometer
dentiroster
Starts with E
14 words
embosser
exposer
expositor
encloser
echosounder
elasmosaur
engrosser
expostulator
eleemosynar
endosmometer
endostylar
enaliosaur
eleemosinar
electrodepositor
Starts with F
9 words
foster
flosser
fosterer
flyposter
fossicker
flossflower
fossor
fooster
floscular
Starts with G
18 words
ghostwriter
gossamer
ghostbuster
gossiper
glossator
gossipmonger
glosser
goosander
gospeler
gospeller
grossglockner
gyrostabilizer
grossular
goster
glossographer
gospodar
gastrosopher
glossodynamometer
Starts with H
11 words
hoser
hostler
hospitaller
hosteller
hosier
hospitaler
hadrosaur
hospodar
hosteler
hraunfossar
hematospectrophotometer
Starts with I
5 words
impostor
ichthyosaur
interposer
imposer
immunosuppressor
Starts with J
3 words
josher
jostler
josser
Starts with K
1 words
kosher
Starts with L
4 words
loser
lossmaker
loosener
leaftosser
Starts with M
17 words
mosher
mosasaur
microsensor
motocrosser
microscooter
megalosaur
mosstrooper
mosser
mesosaur
monoskier
microspectrophotometer
moosehair
microseismometer
mossbunker
monostylar
mossbluiter
metapostscutellar
Starts with N
10 words
nonkosher
nanosensor
nosher
noser
nooser
nonphilosopher
nothosaur
noncrossover
noncomposer
nosographer
Starts with O
20 words
oscar
oscillator
opposer
ostler
osier
oseltamivir
ossicular
osmolar
ovipositor
osmometer
ostracizer
occipitoposterior
ornithomimosaur
ossifier
ostiolar
oscular
ornithosaur
ophthalmostatometer
occipitoscapular
ostreodynamometer
Starts with P
24 words
poster
prosecutor
philosopher
prosper
postwar
posterior
poser
possessor
prospector
postmaster
proposer
phosphor
poseur
prosumer
proselytizer
postholder
plesiosaur
positioner
paternoster
postconsumer
prognosticator
pterosaur
postnuclear
philosophizer
Starts with R
14 words
roster
rooster
rosewater
repossessor
rosser
reposer
repositor
rhynchosaur
rooser
rosiner
reprosper
roseolar
rostellar
rosaker
Starts with S
10 words
shitposter
subpostmaster
stegosaur
snollygoster
supposer
sprosser
scelidosaur
sacroposterior
sacrosecular
spinosotubercular
Starts with T
12 words
tosser
tyrannosaur
titanosaur
transposer
theosopher
troposcatter
therizinosaur
tosher
turbosupercharger
thoseghar
teleosaur
tracheloscapular
Starts with U
3 words
unkosher
utriculosaccular
unbosomer
Starts with V
3 words
viscosimeter
vermicomposter
variolosser
Starts with W
5 words
whosoever
wooster
whosever
wallposter
whosesoever
Starts with Z
2 words
zoster
zymosimeter

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Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.