tot vs summate

tot is a noun but summate is not a noun.

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

As verbs, tot and summate are synonyms defined as:

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

tot (noun)	summate (noun)
a young child who is just beginning to walk
a small amount (especially of a drink)

tot (verb)	summate (verb)
determine the sum of	determine the sum of
	form or constitute a cumulative effect