marginal cost vs incremental cost

marginal cost and incremental cost both are nouns.

Word	Noun	Adjective	Verb	Adverb
marginal cost	Yes	No	No	No
incremental cost	Yes	No	No	No

As nouns, marginal cost and incremental cost are synonyms defined as:

marginal cost and incremental cost: the increase or decrease in costs as a result of one more or one less unit of output

Other synonyms of marginal cost include differential cost.

marginal cost (noun)	incremental cost (noun)
the increase or decrease in costs as a result of one more or one less unit of output	the increase or decrease in costs as a result of one more or one less unit of output