off on of ooh
obnoxious ordinary obsolete original
Lions can be described as overpowering. The word starts with the letter o.
outstanding
old
What are all the words that starts with o
open
quote
Outstanding!
It depends on the meaning you're using for the word "caring." Two words that fit are: Objecting (caring; having an opinion) Overseeing (caring; tending to)
O Henry
over
Very few words start with o. Famous word aum starts with a but not o.