qualify vs qualifier

qualify is not a noun while qualifier is a noun.

Word	Noun	Adjective	Verb	Adverb
qualify	No	No	Yes	No
qualifier	Yes	No	No	No

qualify (noun)	qualifier (noun)
	a content word that qualifies the meaning of a noun or verb
	a contestant who meets certain requirements and so qualifies to take part in the next stage of competition

qualify (verb)	qualifier (verb)
make fit or prepared
add a modifier to a constituent
make more specific
specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement
describe or portray the character or the qualities or peculiarities of
pronounce fit or able
prove capable or fit; meet requirements