adverb vs adverb

adverb and adverb both are nouns.

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

adverb (noun)	adverb (noun)
a word that modifies something other than a noun	a word that modifies something other than a noun
the word class that qualifies verbs or clauses	the word class that qualifies verbs or clauses