duplicate

something additional of the same kind; "he always carried extras in case of an emergency"

a copy that corresponds to an original exactly; "he made a duplicate for the files"

make or do or perform again; "He could never replicate his brilliant performance of the magic trick"

duplicate or match; "The polished surface twinned his face and chest in reverse"

make a duplicate or duplicates of; "Could you please duplicate this letter for me?"

increase twofold; "The population doubled within 50 years"

identically copied from an original; "a duplicate key"

being two identical