tautological

[Cf. F. tautologique.]
Involving tautology; having the same signification; as, tautological expression. -- Tau·to·log·ic·al·ly, adv.

Tautological echo, an echo that repeats the same sound or syllable many times.

Washington Post columnist Charles Krauthammer weighed in on the evolution vs. intelligent design debate, opining that it was actually a debate of apples vs. oranges:

"Intelligent design may be interesting as theology, but as science it is a fraud. It is a self-enclosed, tautological 'theory' whose only holding is that when there are gaps in some area of scientific knowledge — in this case, evolution — they are to be filled by God."

Link: Phony Theory, False Conflict

Posted November 20, 2005.

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adjective

Characterized by repetition and excessive wordiness: circumlocutionary, roundabout. See repetition, words.

The adjective has one meaning:

Meaning #1: repetition of same sense in different words
  Synonyms: pleonastic, redundant, tautologic