taste bud vs gustatory organ

taste bud and gustatory organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
taste bud	Yes	No	No	No
gustatory organ	Yes	No	No	No

As nouns, taste bud and gustatory organ are synonyms defined as:

taste bud and gustatory organ: an oval sensory end organ on the surface of the tongue

Other synonyms of taste bud include tastebud.

taste bud (noun)	gustatory organ (noun)
an oval sensory end organ on the surface of the tongue	an oval sensory end organ on the surface of the tongue