catnap vs light sleep

catnap and light sleep both are nouns.

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

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

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

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

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

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