nap vs catch a wink

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

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

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

Other synonyms of nap include catnap.

nap (noun)	catch a wink (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

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