contemplate vs puzzle

contemplate is not a noun while puzzle is a noun.

Word	Noun	Adjective	Verb	Adverb
contemplate	No	No	Yes	No
puzzle	Yes	No	Yes	No

As verbs, puzzle is a hyponym of contemplate; that is, puzzle is a word with a more specific, narrower meaning than contemplate:

contemplate: reflect deeply on a subject
puzzle: be uncertain about; think about without fully understanding or being able to decide

Other hyponyms of contemplate include premeditate, theologise, theologize, introspect, bethink, cogitate, question, wonder, consider, study.

contemplate (noun)	puzzle (noun)
	a game that tests your ingenuity
	a particularly baffling problem that is said to have a correct solution

contemplate (verb)	puzzle (verb)
think intently and at length, as for spiritual purposes	be a mystery or bewildering to
reflect deeply on a subject	be uncertain about; think about without fully understanding or being able to decide
consider as a possibility
look at thoughtfully; observe deep in thought