Here is a list of words in the SpeedChat Plus dictionary beginning with the letter "O". * o'clock * o'eight * o'henry * o's * o'toole * o-torch * o.o * oak * oak's * oaks * oar * oar's * oared * oaring * oars * oasis * oath * oban * obay * obedience * obeys * obj * object * object's * objected * objecting * objective * objects * obscure * obsequious * observation * observation's * observations * observe * observed * observer * observer's * observers * observes * observing * obsidian * obsidians * obstacle * obstacle's * obstacles * obtain * obtained * obtainer * obtainer's * obtainers * obta