Oafish.
overjoyed
cocoon
Overwhelming is a synonym for awesome. It begins with O.
Outstanding is a flattering word. It begins with O.
octopus i think
orchestrate is an active word that begins with the letter O
A word meaning to leave out which begins with an "o" is omit.
it begins with the letter o. but if you are french, it begins with a letter o.
Bombs are overpowering and destructive. The adjective begins with the 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.
oneodeoreoboeoscillateorangeogreoperateopineobliteratedobdurateobsolete
ophthalmologist
owlish