puzzle out vs reason

puzzle out is not a noun while reason is a noun.

Word	Noun	Adjective	Verb	Adverb
puzzle out	No	No	Yes	No
reason	Yes	No	Yes	No

puzzle out (noun)	reason (noun)
	the capacity for rational thought or inference or discrimination
	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

puzzle out (verb)	reason (verb)
find the solution to (a problem or question) or understand the meaning of	think logically
	decide by reasoning; draw or come to a conclusion
	present reasons and arguments