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tautologism

[taw-tol-uh-jiz-uh m]
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noun
  1. the use of tautology.
  2. a tautology.

Origin of tautologism

First recorded in 1805–15; tautolog(y) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018