local vs benzocaine

local and benzocaine both are nouns.

Word	Noun	Adjective	Verb	Adverb
local	Yes	Yes	No	No
benzocaine	Yes	No	No	No

As nouns, benzocaine is a hyponym of local; that is, benzocaine is a word with a more specific, narrower meaning than local:

local (noun)	benzocaine (noun)
public transport consisting of a bus or train that stops at all stations or stops	a white crystalline ester used as a local anesthetic
anesthetic that numbs a particular area of the body

local (adjective)	benzocaine (adjective)
relating to or applicable to or concerned with the administration of a city or town or district rather than a larger area
affecting only a restricted part or area of the body
of or belonging to or characteristic of a particular locality or neighborhood