maillot vs swimwear

maillot and swimwear both are nouns.

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

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

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

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