Synonyms of attesting

1 Syllable

show, swear, seal

2 Syllables

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

3 Syllables

exhibit, testify, countersign, adjure, ratify, declare, certify, announce, verify

4 Syllables

asservate, indicate, substantiate, demonstrate

5 Syllables

corroborate, authenticate