- of note
- ogive
- orison
- one's word
- ominous
- of supply
- outfitters
- outstretched
- outta here
- oratorio
- outnumber
- one who carries water in a large leathern bag
- only skin and bone
- out of wits
- out_and_out
- old adam
- one_time
- old boy
- onetime
- operagoer
- one who imparts happiness
- obstipation
- one who is in good books
- one who performs the ceremony of nika:h in a muslim marriage
- one who is humbled by fortune
- one who ruins one's own home
- opposition (a wrongly coined equivalent for
- one who indulges in smutty talk
- one who possesses a good handwriting
- one's blood to freeze
- out of true
- one's anger to evaporate
- one's anger to subside
- osier
- orale
- oradexon
- oral exam
- oral pilus
- oral use
- oral antidiabetic agent
- one who incites quarrels or factions
- olive (tree and its fruit)
- olive oil
- oarsmanship
- ornamentalist
- on the loose
- opencast mining
- openhanded
- one who makes an invocation for help or justice
- opening a vein for excretion of impure blood