dress vs gown

dress and gown both are nouns.

Word	Noun	Adjective	Verb	Adverb
dress	Yes	Yes	Yes	No
gown	Yes	No	Yes	No

As nouns, gown is a hyponym of dress; that is, gown is a word with a more specific, narrower meaning than dress:

dress: a one-piece garment for a woman; has skirt and bodice
gown: a woman's dress, usually with a close-fitting bodice and a long flared skirt, often worn on formal occasions

As verbs, gown is a hyponym of dress; that is, gown is a word with a more specific, narrower meaning than dress:

dress (noun)	gown (noun)
a one-piece garment for a woman; has skirt and bodice	a woman's dress, usually with a close-fitting bodice and a long flared skirt, often worn on formal occasions
clothing of a distinctive style or for a particular occasion	outerwear consisting of a long flowing garment used for official or ceremonial occasions
clothing in general	protective garment worn by surgeons during operations
	lingerie consisting of a loose dress designed to be worn in bed by women
	the members of a university as distinguished from the other residents of the town in which the university is located

dress (adjective)	gown (adjective)
(of an occasion) requiring formal clothes
suitable for formal occasions

dress (verb)	gown (verb)
put on clothes	dress in a gown
provide with clothes or put clothes on
apply a bandage or medication to
arrange attractively
dress or groom with elaborate care
give a neat appearance to
dress in a certain manner
kill and prepare for market or consumption
convert into leather
put a dressing on
put a finish on
cultivate, tend, and cut back the growth of
provide with decoration
cut down rough-hewn (lumber) to standard thickness and width
decorate (food), as with parsley or other ornamental foods
arrange in ranks