Synonyms for Sum:

adj.

all (adjective)
entire, complete.
complete (adjective)
full, thorough, unabridged, through, final, integral, uncut, comprehensive, whole, conclusive, done, finished, exhaustive, intact, undivided, all, solid, unsevered, universal, entire, plenary, accomplished, collective, unified, total, complete.
entire (adjective)
conclusive, sweeping, total, all-inclusive, mass, gross, comprehensive, full-grown, holistic, exhaustive, entire, global, full-fledged, full-scale, complete, full, all, tally, whole, all-embracing.

n.

computational, average, countdown, abacus, deviation, decimal place, binomial. the sum total, running total, aggregation, grand total. bond, blood money, bounty, cash flow, bailout, bankroll, change, appropriation. all (noun)
Everything, Everyone, aggregation, collection.
amount (noun)
allowance, number, list, amount, quantity, quantum, portion, ration, proportion, budget, piece, allotment.
body (noun)
core, pith, substance, essence, gist.
calculation (noun)
enumeration, calculus, computation, system, reckoning, judgement, valuation, mathematics, arithmetic, multiplication, statistics, algebra, approximation, quantification, supposition, triangulation, inference, method, consideration, calculation, presumption, measurement, conclusion, assessment, estimation, evaluation, appraisal, determination, thought, division, algorithm, deduction.
cognition (noun)
total, amount.
collection (noun)
aggregate.
completeness (noun)
intactness, plenum, oneness, integration, universe, Allness, thoroughness, Collectivity, unity, integrity, solidarity, entireness.
entirety (noun)
comprehensiveness, gestalt, fullness, conclusiveness, Everyone, Everything, wholeness, exhaustiveness, Everybody, entirety, totality, completeness.
list (noun)
chronicle, yearbook, notebook, annals, collection, budget, repertory, treasury, history, check, register, statement, list, Bank book, menu, lexicon, waybill, log, Storybook, digest, cash book, workbook, invoice, tabulate, summary, roll, index, inventory, docket, book, dictionary, ledger, file, tablet, record, roster, documentation, annual, recording, census, bill, store, detail, thesaurus, scrapbook, scroll, registry, catalog, itemization, logbook, pad, table, diary, recount, journal, daybook, novel, album, blank-book, calendar, manifest.
sum (noun)
mass, tote up, marrow, sum of money, kernel, nub, add, add together, quantity, tot, add up, system, gross, substance, pith, score, inwardness, amount, whole, gist, nitty-gritty, all, summarise, center, aggregate, reckoning, heart and soul, summate, essence, core, sum up, total, summation, entirety, value, totality, union, sum total, integral, tally, tot up, heart, summary, join, summarize, amount of money, meat.

v.

add (verb)
enumerate, accrue, summate, figure, calculate, count, reckon, augment, attain, increment, total, increase, tot, acquire, annex, tot up, accumulate, compute, aggregate.
aggregate (verb)
number, accumulate, add up.
amount (verb)
approximate.
calculate (verb)
infer, judge, surmise, quantize, program, assess, determine, account, triangulate, add, schedule, divide, enumerate, rate, systematize, suppose, measure, weigh, scheme, estimate, quantify, reckon, calculate, conclude, evaluate, think, plot, count, multiply, consider, compute, guess, plan, approximate, rank, figure, gauge, presume, appraise, value, study, rationalize, deduce, score, tally.
stative (verb)
summarize, sum up, summarise.

Other synonyms:

add
tot up, summate.
calculate
tote up, gauge, multiply.
tot
tot.
Other relevant words:
gist, average, essence, summation, center, add up, amount of money, nitty-gritty, summarize, binomial, bounty, join, add together, inwardness, abacus, appropriation, change, sum of money, grand total, heart and soul, computational, aggregation, pith, sum total, union, nub, tot, bankroll, deviation, summate, countdown, kernel, marrow, sum up, substance, bailout, summarise, meat, tot up, heart, bond, core, tote up.

Usage examples for sum

  1. They are worth a large sum I can tell you, and I don't care about keeping them here. – Beric the Briton A Story of the Roman Invasion by G. A. Henty
  2. A good sum and that which I did believe they would give me, and I did expect little less. – Diary of Samuel Pepys, Complete Transcribed From The Shorthand Manuscript In The Pepysian Library Magdalene College Cambridge By The Rev. Mynors Bright by Samuel Pepys Commentator: Lord Braybrooke
  3. Allow me to pay in to- day the sum of five thousand pounds." – John Halifax, Gentleman by Dinah Maria Mulock Craik