posy vs nosegay

posy and nosegay both are nouns.

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

As nouns, posy and nosegay are synonyms defined as:

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

Other synonyms of posy include bouquet, corsage.

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