qualifier vs modifier

qualifier and modifier both are nouns.

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

As nouns, qualifier and modifier are synonyms defined as:

qualifier and modifier: a content word that qualifies the meaning of a noun or verb

qualifier (noun)	modifier (noun)
a content word that qualifies the meaning of a noun or verb	a gene that modifies the effect produced by another gene
a contestant who meets certain requirements and so qualifies to take part in the next stage of competition	a content word that qualifies the meaning of a noun or verb
	a person who changes something
	a moderator who makes less extreme or uncompromising