As nouns the difference between undergarment and corselette
is that undergarment is any garment worn underneath others, especially one worn next to the skin; an item of underwear while corselette is a woman's undergarment that is a combination of a corset and a brassiere; a corselet.
undergarment
English
Noun
(
en noun)
Any garment worn underneath others, especially one worn next to the skin; an item of underwear.
corselette
English
Noun
(
en noun)
A woman's undergarment that is a combination of a corset and a brassiere; a corselet