light sleep vs catnap

light sleep and catnap both are nouns.

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

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

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

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

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

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