paronymous

/pəˈrɑnəməs/
adjective
  1. Of or relating to words that are derived from the same root or have a similar form, often leading to confusion in meaning.
    • The paronymous relationship between 'affect' and 'effect' often trips up new writers.
    • In linguistics class, we studied paronymous pairs like 'historic' and 'historical'.
    • The dictionary included a note about paronymous words to help learners avoid common mistakes.
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