gustatory organ vs tastebud

gustatory organ and tastebud both are nouns.

Word	Noun	Adjective	Verb	Adverb
gustatory organ	Yes	No	No	No
tastebud	Yes	No	No	No

As nouns, gustatory organ and tastebud are synonyms defined as:

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

Other synonyms of gustatory organ include taste bud.

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