O字母開頭的單詞或詞組(第12頁)：
- obliterans pericarditis
- obliterate
- obliterate sth from one's memory
- obliterate traces of murder
- obliterated data
- obliterating phlebitis
- obliteration
- obliteration of accounts
- obliteration of name
- obliterative endo-aneurysmorrhaphy
- obliterative inflammation
- oblitin
- oblivion
- oblivious
- oblong
- oblong hole
- oblongata
- oblongatal
- obloquy
- obmutescence
- obnoxious
- obnoxious matter
- obnubilation
- oboe
- oboist
- obol
- obovate
- obrogation
- obround hole
- obround vessel
- Obs
- obscene
- obscene articles
- obscene libels
- obscene literature
- obscene picture
- obscene publication act
- obscenity
- obscenity in theatre
- obscurant
- obscurantism
- obscurantist