These words look similar but describe different legal situations. A void agreement has no legal effect as a contract. An unlawful purpose is one possible example. A voidable contract generally operates unless a legally protected party properly avoids it. That party may instead affirm it. The right depends on the recognized defect and applicable rules. Watch the difference: void means no effective contract; voidable means a protected party has a choice. It does not mean either party can leave whenever they want. Time limits and exceptions matter. Quick check: does voidable mean either party can always cancel for any reason? No. The relevant rule identifies the protected party and the right to avoid.