reason vs think

reason and think both are nouns.

Word	Noun	Adjective	Verb	Adverb
reason	Yes	No	Yes	No
think	Yes	No	Yes	No

As verbs, think is a hypernym of reason; that is, think is a word with a broader meaning than reason:

reason: think logically
think: use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments

Other hypernyms of reason include cerebrate, cogitate.

As verbs, think is a hypernym of reason; that is, think is a word with a broader meaning than reason:

reason: decide by reasoning; draw or come to a conclusion
think: use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments

Other hypernyms of reason include cerebrate, cogitate.

reason (noun)	think (noun)
the capacity for rational thought or inference or discrimination	an instance of deliberate thinking
a fact that logically justifies some premise or conclusion
a justification for something existing or happening
an explanation of the cause of some phenomenon
a rational motive for a belief or action
the state of having good sense and sound judgment

reason (verb)	think (verb)
think logically	bring into a given condition by mental preoccupation
decide by reasoning; draw or come to a conclusion	use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments
present reasons and arguments	judge or regard; look upon; judge
	recall knowledge from memory; have a recollection
	expect, believe, or suppose
	have in mind as a purpose
	be capable of conscious thought
	focus one's attention on a certain state
	decide by pondering, reasoning, or reflecting
	ponder; reflect on, or reason about
	have or formulate in the mind
	dispose the mind in a certain way
	imagine or visualize