Games
Daily Crossword
Word Puzzle
Word Finder
All games
Featured
Word of the Day
Synonym of the Day
Word of the Year
New words
Language stories
All featured
Pop culture
Slang
Emoji
Memes
Acronyms
Gender and sexuality
All pop culture
Writing tips
Grammar Coach™
Writing hub
Grammar essentials
Commonly confused
All writing tips
Games
Featured
Pop culture
Writing tips
Advertisement
Skip to
Skip to
OSRD
Definitions
(1)
Advertisement
OSRD
Office of Scientific Research and Development.
Advertisement
Advertisement
Advertisement
Advertisement
osprey
OSS
Browse
#
aa
bb
cc
dd
ee
ff
gg
hh
ii
jj
kk
ll
mm
nn
oo
pp
qq
rr
ss
tt
uu
vv
ww
xx
yy
zz