light sleep vs nap

light sleep and nap both are nouns.

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

As nouns, light sleep and nap are synonyms defined as:

light sleep and nap: sleeping for a short period of time (usually not in bed)

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

light sleep (noun)	nap (noun)
sleeping for a short period of time (usually not in bed)	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

light sleep (verb)	nap (verb)
	take a siesta