oh
Outstanding and optimistic are positive words. They begin with the letter o.
overpowering
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)
keep an eye on
agoallegroalsoaltoarmadilloaudio
omnipotent
organicosmosisoxygen
· osmosis
Orbit and ozone are space words. They begin with the letter o.
Obese and oddball are insulting words. They begin with the letter o.
Capable, caring, classy, courteous and cultured are positive words. They begin with the letter C.
Ovary ?