duplicate

(noun) something additional of the same kind. Synonyms: extra. Example: "He always carried extras in case of an emergency."

(noun) a copy that corresponds to an original exactly. Synonyms: duplication. Example: "He made a duplicate for the files."

(verb) make or do or perform again. Synonyms: reduplicate, double, repeat, replicate. Example: "He could never replicate his brilliant performance of the magic trick."

(verb) duplicate or match. Synonyms: twin, parallel. Example: "The polished surface twinned his face and chest in reverse."

(verb) make a duplicate or duplicates of. Example: "Could you please duplicate this letter for me?."

(verb) increase twofold. Synonyms: double. Example: "The population doubled within 50 years."

(adj) identically copied from an original. Example: "A duplicate key."

(adj) being two identical. Synonyms: matching, twin(prenominal), twinned.