invalidators

Those who cancel

Invalidators are people or things that make something null, void, or ineffective.

A legal invalidator might be a technicality that nullifies a contract.

In arguments, invalidators are counterexamples or evidence that disproves a claim.

In software testing, invalidators are inputs designed to break or reject data: The form's invalidators caught the malformed email address.

The word often appears in technical or formal contexts.

nullify

annul

Declare legally void

voidWithout legal effect
cancelRevoke or terminate
revokeOfficially cancel authorization

rescind · abolish · abrogate · overturn · quash · countermand · undo · dissolve · vitiate · neutralize

refute

disprove

Prove something untrue

debunkExpose as false
rebutDisprove by argument
contradictDispute a statement

counterargument · falsify · discredit · rebuttal · controvert · impugn · challenge · expose · repudiate · confute

disqualify

ineligible

Not meeting requirements

unfitNot suited for purpose
unqualifiedLacking required credentials
excludeBar from participation

bar · ban · suspension · misconduct · violation · improper · cheating · fraud · corruption · penalty

Opposites

validation/confirmation

invalidatorsvalidators

Tools that confirm compliance

confirmers · verifiers · authenticators · certifiers · approvers

legal/official status

invalidatorsvalidators

Tools that confirm compliance

ratifiers · authorizers · legalizers · legitimizers · enactors

support vs. undermining

invalidatorssupporters

People who back something

upholders · sustainers · corroborators · bolsterers · strengtheners

Family

valid, invalid, validate, invalidate, validation, validity, validated, validating, invalidity

Familiarity: Top 1,000,000
Profile: Used worldwide · Timeless · Abstract · Rated G