nullification (n.)

• abjuration
• abolishment
• abolition
• abrogation
• annihilation
• annulment
• autarky
• bimetallism
• cancel
• cancellation
• choking
• contradiction
• contravention
• countermand
• crossing
• denial
• deracination
• disaffirmation
• disavowal
• disclaimer
• disownment
• disproof
• elimination
• eradication
• extermination
• extinction
• extirpation
• forswearing
• frustration
• invalidation
• line
• liquidation
• localism
• negation
• neutralization
• noninterference
• nonintervention
• policy
• polity
• position
• protection
• protectionism
• purge
• recall
• recantation
• refutation
• renege
• renunciation
• repeal
• repudiation
• rescission
• retraction
• reversal
• revocation
• revoke
• sectionalism
• stifling
• strangulation
• suffocation
• suppression
• suspension
• thwarting
• undoing
• vacation
• vitiation
• voidance
• voiding
• waiver
• withdrawal
• write-off