costume vs wardrobe

costume and wardrobe both are nouns.

Word	Noun	Adjective	Verb	Adverb
costume	Yes	No	Yes	No
wardrobe	Yes	No	No	No

costume (noun)	wardrobe (noun)
the attire worn in a play or at a fancy dress ball	a tall piece of furniture that provides storage space for clothes; has a door and rails or hooks for hanging clothes
the attire characteristic of a country or a time or a social class	collection of clothing belonging to one person
unusual or period attire not characteristic of or appropriate to the time and place	collection of costumes belonging to a theatrical company
the prevalent fashion of dress (including accessories and hair style as well as garments)

costume (verb)	wardrobe (verb)
dress in a costume
furnish with costumes; as for a film or play