summate vs total

summate is not a noun while total is a noun.

Word	Noun	Adjective	Verb	Adverb
summate	No	No	Yes	No
total	Yes	Yes	Yes	No

As verbs, summate and total are synonyms defined as:

Other synonyms of summate include add, add together, add up, sum, sum up, tally, tot, tot up, tote up.

summate (noun)	total (noun)
	the whole amount
	a quantity obtained by the addition of a group of numbers

summate (adjective)	total (adjective)
	constituting the full quantity or extent; complete
	complete in extent or degree and in every particular

summate (verb)	total (verb)
determine the sum of	damage beyond the point of repair
form or constitute a cumulative effect	determine the sum of
	add up in number or quantity