Synonyms of confirm

1 Syllable

vouch, buy, clinch, check, back, sign, blest, bless

2 Syllables

witness, okay, clinched, checking, clinching, okayed, ostend, proven, vouching, warrant, entrench, prove, strengthen, settling, strengthens, vouched, profess, blesses, reassert, checked, sustains, uphold, sustain, sanction, settle, support, explain, affirm, debunk, affirms, attest

3 Syllables

rubberstamp, endorse, certifying, attesting, double-check, ensured, declaring, showcased, reasserted, approve, justifies, ensuring, justified, ratifying, endorsing, strengthening, ratified, comforted, rubber-stamp, ascertain, establish, constate, guaranteeing, ratify, entrenching, justify, recommend, sustaining, showcasing, verify, ensure, underpin, justifying, professing, affirming, undersign, countersign, attested, declare, subscribe, affirmed, ratifies, mandating, professes, upholding, ascertains, certify, certified, entrenches, strengthened, reasserting

4 Syllables

habituating, substantiate, evidencing, ascertaining, countersigning, substantiated, ascertained, incarnating, approbate, evidenced, manifesting, manifested, countersigned, validating, allegate, validate, habituate, countenanced, substantiating, personizes, recommending, validated

5 Syllables

corroborated, circumstantiate, authenticating, corroborating, corroborate, authenticated, authenticate

7 Syllables

experimentalize