supplanter

/səˈplæntər/
noun
  1. A person or thing that takes the place of another, especially through force or scheming.
    • The new CEO was seen as a supplanter who pushed out the founder.
    • The app was a supplanter of older navigation tools, quickly becoming the market leader.
    • In the story, the younger brother became a supplanter and seized the throne.
Antonyms
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