modifier vs changer

modifier and changer both are nouns.

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

As nouns, modifier and changer are synonyms defined as:

modifier (noun)	changer (noun)
a gene that modifies the effect produced by another gene	an automatic mechanical device on a record player that causes new records to be played without manual intervention
a content word that qualifies the meaning of a noun or verb	a person who changes something
a person who changes something
a moderator who makes less extreme or uncompromising