duplicate

[1]	reduplicate , copy , photocopy , double , repeat , clone , match , replicate , replicate , imitate , reproduce , double , Trade Mark Xerox , repeat , equal
[2]	twin , parallel
[3]	double

[1]	extra
[2]	duplication , (exact/carbon) copy , photocopy , machine copy , double , clone , (perfect) match , facsimile , twin , reproduction , replica , replication , look-alike , Trade Mark Xerox (copy) , (Slang) (dead) ringer

adj.

[1]	identical , twin , matching
[2]	twinned