intensifier vs modifier

intensifier and modifier both are nouns.

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

As nouns, modifier is a hypernym of intensifier; that is, modifier is a word with a broader meaning than intensifier:

intensifier: a modifier that has little meaning except to intensify the meaning it modifies
modifier: a content word that qualifies the meaning of a noun or verb

Other hypernyms of intensifier include qualifier.

intensifier (noun)	modifier (noun)
a modifier that has little meaning except to intensify the meaning it modifies	a gene that modifies the effect produced by another gene
	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