Overcast and ocean breeze are weather words. They begin with the letter o.
octos
Outstanding is a nice word. It begins with the letter O.
origin.
natio
You are serious.
overyou
Ono
AlamoAmigoAminoAudio
There are none. Not even a 3 letter word
Some four letter words that start and end with O are:oleoOreoorzo
Cameo
oceanographer