nonplus vs puzzle

nonplus is not a noun while puzzle is a noun.

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

As verbs, nonplus and puzzle are synonyms defined as:

Other synonyms of nonplus include amaze, baffle, beat, bewilder, dumbfound, flummox, get, gravel, mystify, perplex, pose, stick, stupefy, vex.

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

nonplus (verb)	puzzle (verb)
be a mystery or bewildering to	be a mystery or bewildering to
	be uncertain about; think about without fully understanding or being able to decide