short sleep vs catnap

short sleep and catnap both are nouns.

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

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

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

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

short 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)

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