optimistic
ODour
Outstanding
Observant, optimistic and outgoing
Outstanding, optimistic, outgoing and observant are positive adjectives.
octogon
Some words that start with the letter O are:oceanOddOdeofoffOfficeogreoldOliveOnoneOpalOppositeorOrangeorboreganoorganismorgasmorigamiotherotteroughtOxymoronoval
Ohio
okra
Ozymandias
Some happy words that start with O include: Overjoyed Optimistic Open-hearted
Some German words that start with the letter O are Opa, Oma and oberflächlich.
· onion