pro

nouns

an athlete who plays for pay
pro, professional
an argument in favor of a proposal
pro
antonym
con
is a type of (narrower)
a fact or assertion offered as evidence that something is true
"it was a strong argument that his hypothesis was true"
argument, statement

adjectives

in favor of (an action or proposal etc.)
"a pro vote"
pro
antonym
anti

adverbs

in favor of a proposition, opinion, etc.
pro
antonym
con