Noun
veto [pl. vetoes / vetos]
revocation [pl. revocations]
breach [pl. breaches]
rebuttal [pl. rebuttals]
reversal [pl. reversals]
infringement [pl. infringements]
...
Verb
to breach [ breached ; breached ]
to violate [ violated ; violated ]
to infringe [ infringed ; infringed ]
to revoke [ revoked ; revoked ]