adulterator vs changer

adulterator and changer both are nouns.

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

As nouns, changer is a hypernym of adulterator; that is, changer is a word with a broader meaning than adulterator:

adulterator: a changer who lessens the purity or effectiveness of a substance
changer: a person who changes something

Other hypernyms of adulterator include modifier.

adulterator (noun)	changer (noun)
a changer who lessens the purity or effectiveness of a substance	an automatic mechanical device on a record player that causes new records to be played without manual intervention
any substance that lessens the purity or effectiveness of a substance	a person who changes something