OregonOxford
Ocala
Oleo, olio, onto, ordo, orzo and ouzo are 4 letter words that begin with the letter o and end with o.
I am not aware of any cities in Massachusetts that start with the letter O. However, Oxford, Orange, Orleans, Oak Bluff, and Otis are towns in Massachusetts.
Five letter words that start and end with letter O are outdo and outgo.
Igloo, incognito, indigo, inferno, info, into and intro are words. They begin with I and end with o.
Ohio
Some four letter words that start and end with O are:oleoOreoorzo
i don't know many but there is one called ohio- in america.
Subzero
Auto
Indigo