siesta vs nap

siesta and nap both are nouns.

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

As nouns, nap is a hypernym of siesta; that is, nap is a word with a broader meaning than siesta:

Other hypernyms of siesta include catnap, forty winks, light sleep, short sleep, snooze.

siesta (noun)	nap (noun)
a nap in the early afternoon (especially in hot countries)	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

siesta (verb)	nap (verb)
	take a siesta