corselet vs body armour

corselet and body armour both are nouns.

Word	Noun	Adjective	Verb	Adverb
corselet	Yes	No	No	No
body armour	Yes	No	No	No

As nouns, body armour is a hypernym of corselet; that is, body armour is a word with a broader meaning than corselet:

corselet: a piece of body armor for the trunk; usually consists of a breastplate and back piece
body armour: armor that protects the wearer's whole body

Other hypernyms of corselet include body armor, cataphract, coat of mail, suit of armor, suit of armour.

corselet (noun)	body armour (noun)
a piece of body armor for the trunk; usually consists of a breastplate and back piece	armor that protects the wearer's whole body