Princeton's WordNet

1. sum, sum of money, amount, amount of money(noun)

   a quantity of money

   Synonyms:
   nitty-gritty, sum total, marrow, meat, join, quantity, core, summation, sum, total, aggregate, amount of money, union, gist, heart and soul, totality, sum of money, substance, nub, center, centre, kernel, measure, amount, essence, heart, inwardness, pith

2. amount(noun)

   the relative magnitude of something with reference to a criterion

   Synonyms:
   total, sum of money, measure, quantity, amount of money, sum

3. measure, quantity, amount(noun)

   how much there is or how many there are of something that you can quantify

   Synonyms:
   measure, standard, measuring stick, metre, quantity, meter, amount, mensuration, sum, total, measuring, amount of money, criterion, sum of money, step, bill, measurement, bar, beat, cadence, measuring rod, touchstone

4. sum, amount, total(verb)

   a quantity obtained by the addition of a group of numbers

   Synonyms:
   nitty-gritty, sum total, marrow, meat, join, quantity, core, summation, sum, total, aggregate, amount of money, union, gist, heart and soul, totality, sum of money, substance, nub, center, centre, kernel, measure, amount, essence, heart, inwardness, pith

5. amount(verb)

   be tantamount or equivalent to

   Synonyms:
   total, number, add up, come

6. total, number, add up, come, amount(verb)

   add up in number or quantity

   Synonyms:
   tot, descend, tote up, hail, get, add, get along, fare, numerate, sum, add up, come in, come up, tot up, list, fall, sum up, do, follow, occur, enumerate, count, issue forth, make out, number, amount, tally, derive, make sense, come, add together, total, summate, arrive, keep down

7. come, add up, amount(verb)

   develop into

   Synonyms:
   fare, derive, tally, summate, issue forth, tot, tot up, amount, sum, total, make out, occur, arrive, number, come up, hail, follow, add together, add, get, descend, come, fall, get along, make sense, tote up, do, come in, sum up, add up