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Synonyms

simpleton

American  
[sim-puhl-tuhn] / ˈsɪm pəl tən /

noun

Sometimes Offensive.
  1. an ignorant, foolish, or silly person.

    Synonyms:
    dope, ninny, blockhead, numbskull, fool, dolt

simpleton British  
/ ˈsɪmpəltən /

noun

  1. a foolish or ignorant person

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of simpleton

First recorded in 1640–50; simple + -ton