opine vs opinion

opine is not a noun while opinion is a noun.

Word	Noun	Adjective	Verb	Adverb
opine	No	No	Yes	No
opinion	Yes	No	No	No

opine (noun)	opinion (noun)
	the reason for a court's judgment (as opposed to the decision itself)
	a personal belief or judgment that is not founded on proof or certainty
	a belief or sentiment shared by most people; the voice of the people
	a vague idea in which some confidence is placed
	the legal document stating the reasons for a judicial decision
	a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or proof

opine (verb)	opinion (verb)
expect, believe, or suppose
express one's opinion openly and without fear or hesitation