Synonyms and Antonyms for annul

Synonyms:

• renege on
• revoke
• reverse
• repeal
• countermand
• vacate
• strike down
• lift
• go back on
• cancel
• renegue on
• renege
• overturn
• rescind

Synonyms:

• invalidate
• void
• nullify
• cancel
• strike down
• quash
• stet
• break
• avoid

Antonyms:

• validate