summational vs summative

summational and summative both are adjectives.

Word	Noun	Adjective	Verb	Adverb
summational	No	Yes	No	No
summative	No	Yes	No	No

As adjectives, summational and summative are synonyms defined as:

summational and summative: of or relating to a summation or produced by summation

summational (adjective)	summative (adjective)
of or relating to a summation or produced by summation	of or relating to a summation or produced by summation