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Synonyms for swear

verb

  1. To curse

    blaspheme, utter profanity, cuss*; see curse 1, 2.

  2. To take an oath

    avow, affirm, depose, testify, state, vow, attest, warrant, vouch, assert, swear by, make an affidavit, give witness, cross one's heart.

  3. To declare

    assert, affirm, maintain; see declare 1, justify 2.

See swear in Webster's New World Roget's A-Z Thesaurus II

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