butacaine vs topical anesthetic

butacaine and topical anesthetic both are nouns.

Word	Noun	Adjective	Verb	Adverb
butacaine	Yes	No	No	No
topical anesthetic	Yes	No	No	No

As nouns, topical anesthetic is a hypernym of butacaine; that is, topical anesthetic is a word with a broader meaning than butacaine:

butacaine: a white crystalline ester that is applied to mucous membranes as a local anesthetic
topical anesthetic: anesthetic that numbs a particular area of the body

Other hypernyms of butacaine include local, local anaesthetic, local anesthetic, topical anaesthetic.

butacaine (noun)	topical anesthetic (noun)
a white crystalline ester that is applied to mucous membranes as a local anesthetic	anesthetic that numbs a particular area of the body