obey [əˈbeɪ]
object [ˈɔbdʒɪkt]
ocean [ˈəʊʃ(ə)n]
Oceania
o’clock[əʃklɔk]
October [ɔkˈtəʊbə®]
of [ɔv, əv; (US) ˈɔf]
off [ɔːf]
offer[ˈɔfə®]
office [ˈɔfɪs]
often [ˈɔf(ə)n; (US) ˈɔːfn]
oh [əʊ]
oil [ɔɪl]
OK[əʊˈkeɪ]
old [əʊld]
Olympic(s) [əʊˈlɪmpɪk]
Olympic Games [əʊˈlɪmpɪk ɡeɪms]
on [ɔn]
once [wʌns]
one [wʌn]
oneself [wʌnˈself]
onion[ˈʌnjən]
only [ˈəʊnlɪ]
onto [ˈɔntʊ]
open [ˈəʊpən]
opera [ˈɔpərə]
operate[ˈɔpəreɪt]
opinion [əˈpɪnjən]
or [ə®, ɔː®]
orange [ˈɔrɪndʒ; (US) ˈɔːr-]
order [ˈɔːdə®]
ordinary [ˈɔːdɪnərɪ; (US) ˈɔːrdənerɪ]
other [ˈʌðə®]
our [ˈaʊə®]
ours[ˈaʊəz]
ourselves [aʊəˈselvz]
out [aʊt]
outdoors [aʊtˈdɔːz]
outside [aʊtˈsaɪd]
over [ˈəʊvə®]
overcoat [ˈəʊvəkəʊt]
own [əʊn]
owner[ˈəʊnə®]