Something additional of the same kind.

synonym: extra.

Roget 551: trace, vestige, relic, remains; scar, cicatrix; footstep, footmark^†, footprint; pug; track mark, wake, trail, scent, piste^†.    monument, hatchment^†, slab, tablet, trophy, achievement; obelisk, pillar, column, monolith; memorial; memento etc. (memory) 505; testimonial, medal; commemoration etc. (celebration) 883.    record, note, minute; register, registry; roll etc. (list) 86; cartulary, diptych, Domesday book; catalogue raisonne [Fr.]; entry, memorandum, indorsement^†, inscription, copy, duplicate, docket; notch etc. (mark) 550; muniment^†, deed etc. (security) 771; document; deposition, proces verbal [Fr.]; affidavit; certificate etc. (evidence) 467.    notebook, memorandum book, memo book, pocketbook, commonplace book; portfolio; pigeonholes, excerpta^†, adversaria [Lat.], jottings, dottings^†.    gazette, gazetteer; newspaper, daily, magazine; almanac, almanack^†; calendar, ephemeris, diary, log, journal, daybook, ledger; cashbook^†, petty cashbook^†; professional journal, scientific literature, the literature, primary literature, secondary literature, article, review article.    archive, scroll, state paper, return, blue book; statistics etc. 86; compte rendu [Fr.]; Acts of, Transactions of, Proceedings of; Hansard's Debates; chronicle, annals, legend; history, biography etc. 594; Congressional Records.    registration; registry; enrollment, inrollment^†; tabulation; entry, booking; signature etc. (identification) 550; recorder etc. 553; journalism.    [analog recording media] recording, tape recording, videotape.    [digital recording media] compact disk; floppy disk, diskette; hard disk, Winchester disk; read-only memory, ROM; write once read mostly memory, WORM.    ... show more

Roget 641: redundancy, redundance^†; too much, too many; superabundance, superfluity, superfluence^†, saturation; nimiety^†, transcendency, exuberance, profuseness; profusion etc. (plenty) 639; repletion, enough in all conscience, satis superque [Lat.], lion's share; more than enough etc. 639; plethora, engorgement, congestion, load, surfeit, sickener^†; turgescence etc. (expansion) 194^†; overdose, overmeasure^†, oversupply, overflow; inundation etc. (water) 348; avalanche.    accumulation etc. (store) 636; heap etc. 72; drug, drug in the market; glut; crowd; burden.    excess; surplus, overplus^†; epact^†; margin; remainder etc. 40; duplicate; surplusage^†, expletive; work of supererogation; bonus, bonanza.    luxury; intemperance etc. 954; extravagance etc. (prodigality) 818; exorbitance, lavishment^†.    pleonasm etc. (diffuseness) 573; too many irons in the fire; embarras de richesses [Fr.].    ... show more

Roget 805: credit, trust, tick, score, tally, account.    letter of credit, circular note; duplicate; mortgage, lien, debenture, paper credit, floating capital; draft, lettre de creance [Fr.], securities.    creditor, lender, lessor, mortgagee; dun; usurer.    credit account, line of credit, open line of credit.    credit card.    ... show more

Roget 21: copy, facsimile, counterpart, effigies, effigy, form, likeness.    image, picture, photo, xerox, similitude, semblance, ectype^†, photo offset, electrotype; imitation etc. 19; model, representation, adumbration, study; portrait etc. (representation) 554; resemblance.    duplicate, reproduction; cast, tracing; reflex, reflexion [Brit.], reflection; shadow, echo.    transcript [copy into a non-visual form], transcription; recording, scan.    chip off the old block; reprint, new printing; rechauffe [Fr.]; apograph^†, fair copy.    parody, caricature, burlesque, travesty, travestie^†, paraphrase.    [copy with some differences] derivative, derivation, modification, expansion, extension, revision; second edition etc. (repetition) 104.    servile copy, servile imitation; plagiarism, counterfeit, fake etc. (deception) 545; pasticcio^†.    ... show more

Roget 550: indication; symbolism, symbolization; semiology, semiotics, semeiology^†, semeiotics^†; Zeitgeist.    [means of recognition: property] characteristic, diagnostic; lineament, feature, trait; fingerprint, voiceprint, footprint, noseprint [for animals]; cloven hoof; footfall; recognition (memory) 505.    [means of recognition: tool] diagnostic, divining rod; detector.    sign, symbol; index, indice^†, indicator; point, pointer; exponent, note, token, symptom; dollar sign, dollar mark.    type, figure, emblem, cipher, device; representation etc. 554; epigraph, motto, posy.    gesture, gesticulation; pantomime; wink, glance, leer; nod, shrug, beck; touch, nudge; dactylology^†, dactylonomy^†; freemasonry, telegraphy, chirology [Med.], byplay, dumb show; cue; hint etc. 527; clue, clew, key, scent.    signal, signal post; rocket, blue light; watch fire, watch tower; telegraph, semaphore, flagstaff; cresset^†, fiery cross; calumet; heliograph; guidon; headlight.    [sign (evidence) on physobj of contact with another physobj] mark, scratch, line, stroke, dash, score, stripe, streak, tick, dot, point, notch, nick.    print; imprint, impress, impression.    [symbols accompanying written text to signify modified interpretation] keyboard symbols, printing symbols; [Symbols for emphasis], red letter, italics, sublineation^†, underlining, bold font; jotting; note, annotation, reference; blaze, cedilla, guillemets^†, hachure [Topo.]; [Special Characters list], quotation marks, "; double quotes, " "; parentheses, "( )"; brackets, "[ ]"; braces, "{ }", curly brackets; arrows, slashes; left parenthesis, "("; right parenthesis, ")"; opening bracket, "["; closing bracket, "]"; left curly brace, "{"; right curly brace, "}"; left arrow, ""; forward slash, "/"; backward slash, "\\"; exclamation point, "!"; commercial at, "@"; pound sign, "#"; percent sign, "%"; carat, "^"; ampersand, "&"; asterisk, "*"; hyphen, "-"; dash, "-", "_"; em dash, "--"; plus sign, "+"; equals sign, "="; question mark, "?"; period, "."; semicolon, ";"; colon, ":"; comma, ","; apostrophe, "'"; single quote, "'"; tilde, "~". [For identification: general] badge, criterion; countercheck^†, countermark^†, countersign, counterfoil; duplicate, tally; label, ticket, billet, letter, counter, check, chip, chop; dib^†; totem; tessera^†, card, bill; witness, voucher; stamp; cacher [Fr.]; trade mark, Hall mark.    [For identification of people, on a document] signature, mark, autograph, autography; attestation; hand, hand writing, sign manual; cipher; seal, sigil [Lat.], signet, hand and seal [Law]; paraph^†, brand; superscription; indorsement^†, endorsement.    [For identification of people, to gain access to restricted (locations or information)] password, watchword, catchword; security card, pass, passkey; credentials etc. (evidence) 467; open sesame; timbrology^†; mot de passe [Fr.], mot du guet [Fr.]; pass-parole; shibboleth.    title, heading, docket.    address card, visiting card; carte de visite [Fr.].    insignia; banner, banneret^†, bannerol^†; bandrol^†; flag, colors, streamer, standard, eagle, labarum^†, oriflamb^†, oriflamme; figurehead; ensign; pennon, pennant, pendant; burgee^†, blue Peter, jack, ancient, gonfalon, union jack; banderole, old glory [U.S.], quarantine flag; vexillum^†; yellow-flag, yellow jack; tricolor, stars and stripes; bunting.    heraldry, crest; coat of arms, arms; armorial bearings, hatchment^†; escutcheon, scutcheon; shield, supporters; livery, uniform; cockade, epaulet, chevron; garland, love knot, favor.    [Of locality] beacon, cairn, post, staff, flagstaff, hand, pointer, vane, cock, weathercock; guidepost, handpost^†, fingerpost^†, directing post, signpost; pillars of Hercules, pharos; bale-fire, beacon-fire; l'etoile du Nord [Fr.]; landmark, seamark; lighthouse, balize^†; polestar, loadstar^†, lodestar; cynosure, guide; address, direction, name; sign, signboard.    [Of the future] warning etc. 668; omen etc. 512; prefigurement etc. 511.    [Of the past] trace, record &c., 551.    [Of danger] warning etc. 668, alarm etc. 669.    [of authority]. scepter etc. 747.    [of triumph]. trophy etc. 733.    [of quantity]. gauge etc. 466.    [Of Distance] milestone, milepost.    [Of disgrace], brand, fool's cap.    [For detection], check, telltale; test etc. (experiment) 463; mileage ticket; milliary^†.    notification etc. (information) 527; advertisement etc. (publication) 531.    word of command, call; bugle call, trumpet call; bell, alarum, cry; battle cry, rallying cry; angelus^†; reveille; sacring bell^†, sanctus bell [Lat.].    exposition etc. (explanation) 522, proof etc. (evidence) 463; pattern etc. (prototype) 22.    ... show more

Dutch: bijverdienste, emolumenten, neveninkomsten
Polish: dodatek

A copy that corresponds to an original exactly:
— He made a duplicate for the files.

synonym: duplication.

Dutch: kopie, duplicaat
Polish: wtórnik, duplikat

Make or do or perform again.

synonyms: double, reduplicate, repeat, replicate.

Roget 90: double, redouble, duplicate, reduplicate; geminate; repeat etc. 104; renew etc. 660.   

Dutch: wederhalen, herhalen, itereren, overdoen

Duplicate or match.

synonyms: parallel, twin.

Make a duplicate or duplicates of.

Increase twofold.

synonym: double.

Dutch: doubleren, redupliceren, verdubbelen

Identically copied from an original.

Roget 641: redundant; too much, too many; exuberant, inordinate, superabundant, excessive, overmuch, replete, profuse, lavish; prodigal etc. 818; exorbitant; overweening; extravagant; overcharged etc. v.; supersaturated, drenched, overflowing; running over, running to waste, running down.    crammed to overflowing, filled to overflowing; gorged, ready to burst; dropsical, turgid, plethoric; obese etc. 194.    superfluous, unnecessary, needless, supervacaneous^†, uncalled for, to spare, in excess; over and above etc. (remainder) 40; de trop [Fr.]; adscititious etc. (additional) 37; supernumerary etc. (reserve) 636; on one's hands, spare, duplicate, supererogatory, expletive; un peu fort [Fr.].    ... show more

Being two identical.

synonyms: matching, twin, twinned.

Roget 90: double; doubled etc. v.; bicipital^†, bicephalous^†, bidental^†, bilabiate, bivalve, bivalvular^†, bifold^†, biform^†, bilateral; bifarious^†, bifacial^†; twofold, two-sided; disomatous^†; duplex; double-faced, double-headed; twin, duplicate, ingeminate^†; second.    ... show more

Polish: zbliźniaczony, bliźniaczy, bliźnięcy