underpants

As nouns the difference between taxonomy and underpants

is that taxonomy is the science or the technique used to make a classification while underpants is underwear, clothing covering the genitalia.

As nouns the difference between underpants and pantalettes

is that underpants is underwear, clothing covering the genitalia while pantalettes is a form of long underpants with a frill at the bottom of each leg.

As nouns the difference between underpants and spankies

is that underpants is underwear, clothing covering the genitalia while spankies is full underpants worn by cheerleaders, colour-coordinated as part of a matching outfit and designed to be seen under their skirts.

As a noun underpants

is underwear, clothing covering the genitalia.

As an adjective pantless is

(us) not wearing pants (trousers).