substantiate

Synonyms

argue, attest, authenticate, bear out, certify, confirm, corroborate, support, validate, verify, vindicate;

Antonyms

disprove, rebut, refute;

Near Antonyms

contradict, gainsay;

deny, disavow, disclaim;

challenge, contest, dispute, question;

Related Words

avouch, back (up), testify (to), vouch (for), witness;

guarantee, warrant;

affirm, assert, aver, avow, declare, profess;

demonstrate, document, establish, prove, reinforce (also reenforce);