- outrage of modesty
- OMB
- Office of Management and Budget
- ovipositor
- onintment of ammoniated mercury
- one_half of a couplet
- osip emilevich mandelstam
- one who wields authority
- office time
- office or status of a
- onerousness
- olympic god
- onopordum acanthium
- onopordon acanthium
- oleandraceae
- outer boundary
- oppressing
- oppression and repression
- ostensive definition
- overexertion
- origami
- one of the six systems of hindu philosophy (so called either as teaching the ultimate scope of the veda or simply as explained in the upanishads which come at the end of the vedas)
- open ended
- out of the question
- one who plays on a
- on the other side
- off_roader
- opportune place
- on the hour
- on a lower floor
- of one and the same caste
- one and half_times
- one who has attained expertise in
- outback
- one of the eight siddhis which enables a man to assume as tiny a form as he likes
- out of the running
- off chance
- or to try to make a silk purse out of a sow's ears
- optimistic attitude
- one who interferes
- one_year
- one_way light time
- output contract
- orifice plate
- orifice sparger
- osculator
- old style font
- overtrump
- out_basket
- ossuary