costume vs rigout

costume and rigout both are nouns.

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

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

Other hyponyms of costume include academic costume.

costume (noun)	rigout (noun)
the attire worn in a play or at a fancy dress ball	a person's costume (especially if bizarre)
the attire characteristic of a country or a time or a social class
unusual or period attire not characteristic of or appropriate to the time and place
the prevalent fashion of dress (including accessories and hair style as well as garments)

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