tights vs leotards

tights and leotards both are nouns.

Word	Noun	Adjective	Verb	Adverb
tights	Yes	No	No	No
leotards	Yes	No	No	No

As nouns, tights and leotards are synonyms defined as:

tights and leotards: skintight knit hose covering the body from the waist to the feet worn by acrobats and dancers and as stockings by women and girls

tights (noun)	leotards (noun)
skintight knit hose covering the body from the waist to the feet worn by acrobats and dancers and as stockings by women and girls	skintight knit hose covering the body from the waist to the feet worn by acrobats and dancers and as stockings by women and girls