catch a wink vs nap

catch a wink is not a noun while nap is a noun.

Word	Noun	Adjective	Verb	Adverb
catch a wink	No	No	Yes	No
nap	Yes	No	Yes	No

As verbs, catch a wink and nap are synonyms defined as:

Other synonyms of catch a wink include catnap.

catch a wink (noun)	nap (noun)
	sleeping for a short period of time (usually not in bed)
	a card game similar to whist; usually played for stakes
	the yarn (as in a rug or velvet or corduroy) that stands up from the weave
	a soft or fuzzy surface texture
	a period of time spent sleeping

catch a wink (verb)	nap (verb)
take a siesta	take a siesta