Open Minded
Outstanding is a nice word. It begins with the letter O.
Overtime!
object
The word starting with O that means working extra is overtime. It tends to be a word used when a person works over the expected hours. The pay is typically increased during this time.
Orthography
obtainable workovertime
Outstanding is a nice word. Optimistic is a nice word.
veto
Outstanding is a nice complimentary word. Optimistic is a nice positive word.
Obliterate
Outstanding is a nice descriptive word. Optimistic is a nice descriptive word.
Omniscience is nice. Oratorios and operas are usually nice.