O
obvious = očiten

occasion = priložnost; dogodek
o'clock =
It's five o'clock. = Ura je pet.
October = oktober
of course = seveda, jasno
often = pogosto, večkrat
O.K. = v redu, dobro, prav
okay = v redu, dobro, prav
old = star
on = na, v
on the floor= na tleh
on Wednesday = v sredo
one = ena; eden
only = samo; edini
an only child = edinec, edinka
open = odprt; odpreti
operate = operirati
optimist = optimist
orange = pomaranča; oranžen
orchestra = orkester
order = naročiti; naročilo
organize = organizirati
original = izviren, originalen; iznajdljiv
other = drugi/a
Ottawa = glavno mesto Kanade
our = nš; najin
out = ven; zunaj
go out = iti ven
outside = zunaj
oven = pečica; peč
ovenproof = ognjevaren, odporen proti vročini
over = čez, preko
over here = sem, semkaj
over there = tamle
jump over a rope = skakati čez vrv
overdo = naprezati se, pretiravati
own = lasten; lastiti si
noon = poldan
a room of my own = moja (lastna) soba
Oxford = mesto v V. Britaniji