nightdress vs nightcap

nightdress and nightcap both are nouns.

Word	Noun	Adjective	Verb	Adverb
nightdress	Yes	No	No	No
nightcap	Yes	No	No	No

nightdress (noun)	nightcap (noun)
lingerie consisting of a loose dress designed to be worn in bed by women	the final game of a double header
	a cloth cap worn in bed
	an alcoholic drink taken at bedtime; often alcoholic