• carbon, counterpart, ditto, ditto, dittoes, doublet, duplicate, duplication, engrossment, replica, reproduction, tally, transcript
• copier, copy machine, copying machine, photocopier
• carbon, flimsy, onion-skin
• I certify this a true copy
• to copy, to engross, to reproduce, to transcribe, to write out
• transcription, transfer
• carbon printing, carbon process