counterpart, equal
● Double
● Competitor
● Like
● Correlate
● Rival
● Equivalent
● Ringer
● Duplicate
● Parallel
● Approximation
● Twin
● Mate
● Companion
● Adversary
● Peer
● Analogue
● Copy
● Replica
● Complement
● Antagonist
● Opponent
● Dead ringer
● Spitting image
● Lookalike
● Original
● Difference
● Mismatch
● Imbalance
● Clash
● Supporter
● Helper
● Ally
● Associate
● Countertype