Oh, I'm rich
Another word for water that starts with the letter 'O' is oxygen dihydrogen.
originonset
Orator is another word for speaker.
Ogre, generally
Onus
other
outstanding i hope this helps B)
oblong.
oblong; such as an oval or rectangle
Ogre - as in Shrek
the word that starts with the letter o isonizalation glad to help
Orb, octopus, ow are some examples. you can look in the "o" section in a dictionary for more words.