Ophidian. It can also be used as an adjective, as in "ophidian eyes" or "an ophidian coolness."
Osage copperhead is a snake. It begins with O.
another word for chasm that begins with o omission opening oversight
obnoxious?
Obliging is a synonym for obedient. It begins with O.
Olive Sea snake
outdo
A word meaning to leave out which begins with an "o" is omit.
orchestrate is an active word that begins with the letter O
Olive snake the full name of it is the olive brown sea snake
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.
overdo