bathing suit vs garment

bathing suit and garment both are nouns.

Word	Noun	Adjective	Verb	Adverb
bathing suit	Yes	No	No	No
garment	Yes	No	Yes	No

As nouns, garment is a hypernym of bathing suit; that is, garment is a word with a broader meaning than bathing suit:

bathing suit (noun)	garment (noun)
tight fitting garment worn for swimming	an article of clothing

bathing suit (verb)	garment (verb)
	provide with clothes or put clothes on