counterpart (n.)

• ally
• analogue
• associate
• brother
• clone
• cognate
• companion
• compeer
• complement
• congenator
• congener
• coordinate
• correlate
• correlative
• correspondent
• ditto
• double
• dupe
• duplicate
• duplication
• equal
• equivalent
• facsimile
• fellow
• image
• like
• likeness
• match
• mate
• model
• obverse
• parallel
• peer
• pendant
• picture
• quadruplicate
• reciprocal
• repetition
• replica
• replication
• representation
• reproduction
• rival
• similitude
• simulacrum
• sister
• such
• tally
• triplicate
• twin
• vis-a-vis