maillot vs swimsuit

maillot and swimsuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
maillot	Yes	No	No	No
swimsuit	Yes	No	No	No

As nouns, swimsuit is a hypernym of maillot; that is, swimsuit is a word with a broader meaning than maillot:

Other hypernyms of maillot include bathing costume, bathing suit, swimming costume, swimwear.

maillot (noun)	swimsuit (noun)
tights for dancers or gymnasts	tight fitting garment worn for swimming
a woman's one-piece bathing suit