Synonyms of attested

1 Syllable

show, swear, seal

2 Syllables

support, aver, assert, valid, witness, warrant, argue, confirm, prove, uphold, sustain, display

3 Syllables

endorsed, exhibit, testify, countersign, adjure, ratify, declare, certify, guaranteed, announce, archival, verify

4 Syllables

asservate, historical, indicate, substantiate, demonstrate

5 Syllables

corroborate, circumstantiated, authenticate

6 Syllables

authoritative