1.  duplication(n = noun.artifact) duplicate - a copy that corresponds to an original exactly; "he made a duplicate for the files"
is a kind of copy
has particulars: backup, computer backup, counterpart, similitude, twin, match, mate
Derived form verb duplicate₃

2.  duplication(n = noun.act) gemination - the act of copying or making a duplicate (or duplicates) of something; "this kind of duplication is wasteful"
is a kind of copying
Derived form verb duplicate₃

N  imitation, copying, transcription, repetition, duplication, reduplication, quotation, reproduction, mimeograph, xerox, facsimile, reprint, offprint, mockery, mimicry, simulation, impersonation, personation, representation, semblance, copy, assimilation, paraphrase, parody, take-off, lampoon, caricature, plagiarism, forgery, counterfeit, celluloid, imitator, echo, cuckoo, parrot, ape, monkey, mocking bird, mime, copyist, copycat, plagiarist, pirate, imitated, mock, mimic, modelled after, molded on, paraphrastic, literal, imitative, secondhand, imitable, aping, apish, mimicking, literally, to the letter, verbatim, literatim, sic, totidem verbis, word for word, mot a mot, exactly, precisely, like master like man, like - but oh! how different!, genius borrows nobly, pursuing echoes calling 'mong the rocks, quotation confesses inferiority, Imitation is the sincerest form of flattery.

N  duplication, doubling, gemination, ingemination, reduplication, iteration, renewal, double, doubled, bicipital, bicephalous, bidental, bilabiate, bivalve, bivalvular, bifold, biform, bilateral, bifarious, bifacial, twofold, two-sided, disomatous, duplex, double-faced, double-headed, twin, duplicate, ingeminate, second, twice, once more, over again, as much again, twofold, secondly, in the second place, again.