overjoyed
cocoon
Outstanding is a flattering word. It begins with O.
Overwhelming is a synonym for awesome. It begins with O.
octopus i think
A word meaning to leave out which begins with an "o" is omit.
orchestrate is an active word that begins with the letter O
Bombs are overpowering and destructive. The adjective begins with the letter O.
it begins with the letter o. but if you are french, it begins with a letter o.
otiose
overdo
Outside?
Offend is a synonym for the word hurt. It begins with the letter O.
One-half is a hyphenated word. It begins with the letter O.
off
owlish
oneodeoreoboeoscillateorangeogreoperateopineobliteratedobdurateobsolete