taste bud vs tastebud

taste bud and tastebud both are nouns.

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

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

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

Other synonyms of taste bud include gustatory organ.

taste bud (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