Synonyms of invalidated

1 Syllable
quash, nix
2 Syllables
weaken, offset, annul, impair, unfit, undo, cancel, x-out
3 Syllables
circumduct, disannul, overthrow, negate, refute, revoke, discredit, abolish, nullify, abate, counteract
4 Syllables
neutralize, negative, abrogate, disqualify, overrule, undermine
5 Syllables
counterbalance, annihilate