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.
underpants
English
Synonyms
* (underwear) boxers, briefs, bloomers, (UK'') pants, panties, (slang) undies, tighty whities, knickers, drawers, (''slang, New Zealand ) gruds, longjohns, thong, underwear
See also
(Other terms of interest)
* boxer shorts
* kegs
* knickers
* panties
* Y-fronts
pantalettes
English
Alternative forms
* pantalets
Noun
(-)
A form of long underpants with a frill at the bottom of each leg
* 1929 , , Chapter IX, Section iii:
*:In the second row of the with streamers,