resultant vs incidental

resultant and incidental both are nouns.

Word	Noun	Adjective	Verb	Adverb
resultant	Yes	Yes	No	No
incidental	Yes	Yes	No	No

As adjectives, resultant and incidental are synonyms defined as:

Other synonyms of resultant include accompanying, attendant, collateral, concomitant, consequent, ensuant, sequent.

resultant (noun)	incidental (noun)
a vector that is the sum of two or more other vectors	an item that is incidental
something that results	(frequently plural) an expense not budgeted or not specified
the final point in a process

resultant (adjective)	incidental (adjective)
occurring with or following as a consequence	(sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
	not of prime or central importance
	occurring with or following as a consequence