corsage vs posy

corsage and posy both are nouns.

Word	Noun	Adjective	Verb	Adverb
corsage	Yes	No	No	No
posy	Yes	No	No	No

As nouns, corsage and posy are synonyms defined as:

corsage and posy: an arrangement of flowers that is usually given as a present

Other synonyms of corsage include bouquet, nosegay.

corsage (noun)	posy (noun)
an arrangement of flowers that is usually given as a present	an arrangement of flowers that is usually given as a present