modifier vs moderator

modifier and moderator both are nouns.

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

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

modifier (noun)	moderator (noun)
a gene that modifies the effect produced by another gene	someone who mediates disputes and attempts to avoid violence
a content word that qualifies the meaning of a noun or verb	someone who presides over a forum or debate
a person who changes something	in the Presbyterian church, the officer who presides over a synod or general assembly
a moderator who makes less extreme or uncompromising	any substance used to slow down neutrons in nuclear reactors