total vs sum

total and sum both are nouns.

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

As nouns, total and sum are synonyms defined as:

Other synonyms of total include aggregate, totality.

As nouns, total and sum are synonyms defined as:

total and sum: a quantity obtained by the addition of a group of numbers

Other synonyms of total include amount.

As verbs, total and sum are synonyms defined as:

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

total (noun)	sum (noun)
the whole amount	the whole amount
a quantity obtained by the addition of a group of numbers	the choicest or most essential or most vital part of some idea or experience
	a quantity obtained by the addition of a group of numbers
	the final aggregate
	a set containing all and only the members of two or more given sets
	a quantity of money

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

total (verb)	sum (verb)
damage beyond the point of repair	determine the sum of
determine the sum of	be a summary of
add up in number or quantity