funny; amusing; comical; laughable; ridiculous
small dish (usu. one of several accompanying rice); side dish
ocarina (type of flute)
occult
octave
okra (Abelmoschus esculentus)
Oklahoma
orchestra
to be proud; to be haughty; to be arrogant; to be conceited; to brag; to show off
wee-wee; pee-pee; number one
the end; closing; being done for
Oscar; Academy Award
Oceania
ozone
ozone hole
otaku; geek; nerd; enthusiast
Ottawa (Canada)
Oxford
OK; okay
middle-aged man
uh-oh; oops; sorry
boobs; boobies; breasts; tits
brow; forehead
oden; dish of various ingredients, e.g. egg, daikon, potato, chikuwa, konnyaku stewed in soy-flavored dashi
timidly; nervously; hesitantly; trembling (with fear); fearfully; anxiously
wind; gas; fart
onion (Allium cepa)
onigiri; rice ball (often triangular, sometimes with a filling and wrapped in nori)
granny; grandma; gran
Ohio
good morning
good morning
opinion
opinion leader
(switched) off
official
office
observer
offside
off-season
objet d'art; item of artwork
option; choice
paper-thin wafer (for wrapping powdered medicine, candies, etc.)
off-the-record
off-road
operation
opera
operation
operator
operetta
something thrown in (with a purchase); something extra; free gift; freebie; giveaway; premium; prize
to make matters worse; besides; what's more; in addition; on top of that
long-awaited; long-waited-for
diaper; nappy
omnibus
omelette; omelet
omega (last letter of the Greek alphabet)
congratulations!; well done!; best wishes!; all the best!
congratulations
hospitality; reception; treatment; service; entertainment