posy vs bouquet

posy and bouquet both are nouns.

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

As nouns, posy and bouquet are synonyms defined as:

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

Other synonyms of posy include corsage, nosegay.

posy (noun)	bouquet (noun)
an arrangement of flowers that is usually given as a present	an arrangement of flowers that is usually given as a present
	a pleasingly sweet olfactory property