duplicate

Adjective

• being two identical

• identically copied from an original
  • a duplicate key
    

Noun

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

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

Verb

• increase twofold
  • The population doubled within 50 years
    

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

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

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

Related words

• Synonyms: 
  matching , twin(a) , twinned , duplication , extra , double , twin , parallel , reduplicate , repeat , replicate