modifier vs adverb

modifier and adverb both are nouns.

Word	Noun	Adjective	Verb	Adverb
modifier	Yes	No	No	No
adverb	Yes	No	No	No

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

Other hyponyms of modifier include intensifier, intensive, adjective, dangling modifier, misplaced modifier.

modifier (noun)	adverb (noun)
a gene that modifies the effect produced by another gene	a word that modifies something other than a noun
a content word that qualifies the meaning of a noun or verb	the word class that qualifies verbs or clauses
a person who changes something
a moderator who makes less extreme or uncompromising