Browse the Oxford Advanced Learner's Dictionary
- orthodontics
noun - orthodontist
noun - orthodox
adjective - orthodoxy
noun - orthographic
adjective - orthography
noun - orthopaedic
adjective - orthopaedics
noun - orthorexia
noun - Orwellian
adjective - -ory
suffix - oryx
noun - orzo
noun - OS
abbreviation - Osage
noun - Osbert Lancaster
- Osborne House
- Oscar
- Oscar Hammerstein
- Oscar
noun - Oscar Wilde
- oscillate
verb - oscillation
noun - oscillator
noun - oscilloscope
noun - OSHA
- osier
noun - osmium
noun - osmosis
noun - osmotic
adjective - osprey
noun - osseous
adjective - ossicle
noun - ossification
noun - ossify
verb - ostensible
adjective - ostensibly
adverb - ostentation
noun - ostentatious
adjective - ostentatiously
adverb - osteo-
combining form - osteoarthritis
noun - osteopath
noun - osteopathic
adjective - osteopathy
noun - osteoporosis
noun - ostler
noun - ostracism
noun - ostracize
verb - ostrich
noun