tot up vs add

tot up and add both are verbs.

Word	Noun	Adjective	Verb	Adverb
tot up	No	No	Yes	No
add	No	No	Yes	No

As verbs, tot up and add are synonyms defined as:

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

tot up (verb)	add (verb)
determine the sum of	make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of
	make an addition by combining numbers
	determine the sum of
	state or say further
	bestow a quality on
	constitute an addition