Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun tautology

2 senses of tautology

Sense 1
tautology -- ((logic) a statement that is necessarily true; "the statement `he is brave or he is not brave' is a tautology")
       => truth, true statement -- (a true statement; "he told the truth"; "he thought of answering with the truth but he knew they wouldn't believe it")

Sense 2
tautology -- (useless repetition; "to say that something is `adequate enough' is a tautology")
       => repetitiveness, repetitiousness -- (verboseness resulting from excessive repetitions)