See avow in Webster's New World Roget's A-Z Thesaurus II
verb
To recognize, often reluctantly, the reality or truth of:
acknowledge, admit, concede, confess, grant, own (up). (Slang) fess up. (Chiefly Regional) allow. See affirm, knowledgeTo put into words positively and with conviction:
affirm, allege, argue, assert, asseverate, aver, avouch, claim, contend, declare, hold, maintain, say, state. Idiom: have it. See affirm
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