Orlando Otilio
Vancover Grizzlies
agoallegroalsoaltoarmadilloaudio
Onyx
oy
Omen?
Orca
Olingo.
Several four letter words begin with the letter q. However, there are no four letter words that begin with the letter q and end with the letter o.
Oleo, olio, onto, ordo, orzo and ouzo are 4 letter words that begin with the letter o and end with o.
domino, dodo, dingo,
omlet
Igloo, incognito, indigo, inferno, info, into and intro are words. They begin with I and end with o.