Oh shit is a curse word. People may say it when they have forgotten to do something very important.
People yell Objection (attorney in court), OK, Ouch and Out (Baseball). They begin with the letter o.
an obscenity
Oath
Obtuse
obnoxious
orchestrate is an active word that begins with the letter O
it begins with the letter o. but if you are french, it begins with a letter o.
One-half is a hyphenated word. It begins with the letter O.
onlyonceomenopenomitoverontoovidovum
overdo
Bombs are overpowering and destructive. The adjective begins with the letter O.
off
Outstanding is a nice word. It begins with the letter O.
Outside?
Offensive is a synonym for horrible. It begins with the letter O.
overwhelmingoverwroughtoutstanding
· Organ