Supplantation refers to the act of replacing or displacing someone or something. There are many synonyms for supplantation, including substitution, replacement, takeover, usurpation, ousting, and displacement. Each synonym carries a slightly different connotation or context, but they all have the same general meaning of taking the place of something or someone else. For example, a new technology may supplant an older one, or a new leader may usurp the position of the previous one. Understanding the nuances of these different synonyms can help writers choose the most appropriate word to convey their intended meaning.