Browse the Oxford Advanced Learner's Dictionary
- onomatopoeic
adjective - onrush
noun - ONS
- onset
noun - onshore
adjective - onshore
adverb - onside
adjective - onside
adverb - onslaught
noun - onstage
adjective - onstage
adverb - Ontario
- onto
preposition - ontological
adjective - ontology
noun - onus
noun - onward
adjective - Onward, Christian Soldiers
- onwards
adverb - onyx
noun - oo-er
exclamation - oodles
noun - ooh
exclamation - oolong tea
noun - oompah
noun - oomph
noun - oops
exclamation - oops-a-daisy
exclamation - ooze
noun - ooze
verb - oozy
adjective - op art
noun - op
noun - op shop
noun - op-ed
noun - Op.
abbreviation - op. cit.
abbreviation - opacity
noun - opal
noun - opalescent
adjective - opaque
adjective - opcode
noun - OPEC
abbreviation - open access
noun - open
adjective - open bar
noun - open carry
noun - open day
noun - open door
adjective - open door
noun