incremental cost vs differential cost

incremental cost and differential cost both are nouns.

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

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

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

Other synonyms of incremental cost include marginal cost.

incremental cost (noun)	differential 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