qualifying vs qualify

qualifying is a noun but qualify is not a noun.

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

qualifying (noun)	qualify (noun)
success in satisfying a test or requirement
the grammatical relation that exists when a word qualifies the meaning of the phrase

qualifying (verb)	qualify (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