nap vs sleep

nap and sleep both are nouns.

Word	Noun	Adjective	Verb	Adverb
nap	Yes	No	Yes	No
sleep	Yes	No	Yes	No

As nouns, nap and sleep are synonyms defined as:

As verbs, sleep is a hypernym of nap; that is, sleep is a word with a broader meaning than nap:

Other hypernyms of nap include catch some Z's, kip, log Z's, slumber.

nap (noun)	sleep (noun)
sleeping for a short period of time (usually not in bed)	a natural and periodic state of rest during which consciousness of the world is suspended
a card game similar to whist; usually played for stakes	euphemisms for death (based on an analogy between lying in a bed and in a tomb)
the yarn (as in a rug or velvet or corduroy) that stands up from the weave	a torpid state resembling deep sleep
a soft or fuzzy surface texture	a period of time spent sleeping
a period of time spent sleeping

nap (verb)	sleep (verb)
take a siesta	be asleep
	be able to accommodate for sleeping