tastebud vs taste bud

tastebud and taste bud both are nouns.

Word	Noun	Adjective	Verb	Adverb
tastebud	Yes	No	No	No
taste bud	Yes	No	No	No

As nouns, tastebud and taste bud are synonyms defined as:

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

Other synonyms of tastebud include gustatory organ.

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