The best replacement for duplication is replication.

The best alternatives to duplication are rated as following:
★★★★★  replication
★★  replication dna
★★  cd replication
★  duplicity
★  speciation
★  dvd replication
★  translocation
★  diprosopus
  replication cd

Your alternative for duplication is not listed? Suggest!
Speaking about duplication, one probably shouldn't forget about deletion.

Other search terms related to duplication and their ratings are:
★★★★★ deletion
You have in mind a companion for duplication and it is not yet here? Propose!



Google Trends

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duplication
replication
replication dna