adjuvant vs additive

adjuvant and additive both are nouns.

Word	Noun	Adjective	Verb	Adverb
adjuvant	Yes	Yes	No	No
additive	Yes	Yes	No	No

As nouns, additive is a hypernym of adjuvant; that is, additive is a word with a broader meaning than adjuvant:

adjuvant (noun)	additive (noun)
an additive that enhances the effectiveness of medical treatment	something added to enhance food or gasoline or paint or medicine

adjuvant (adjective)	additive (adjective)
enhancing the action of a medical treatment	characterized or produced by addition
furnishing added support	designating or involving an equation whose terms are of the first degree