summate vs add together

summate and add together both are verbs.

Word	Noun	Adjective	Verb	Adverb
summate	No	No	Yes	No
add together	No	No	Yes	No

As verbs, summate and add together are synonyms defined as:

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

summate (verb)	add together (verb)
determine the sum of	make an addition by combining numbers
form or constitute a cumulative effect	determine the sum of