nap vs time period

nap and time period both are nouns.

Word	Noun	Adjective	Verb	Adverb
nap	Yes	No	Yes	No
time period	Yes	No	No	No

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

Other hypernyms of nap include period, period of time.

nap (noun)	time period (noun)
sleeping for a short period of time (usually not in bed)	an amount of time
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)	time period (verb)
take a siesta