The word "de-feasances" refers to the act of canceling or nullifying a legal agreement or contract. Antonyms for this term include "enforcement," which refers to implementing or carrying out a legal agreement or contract, and "validation," which denotes verifying or confirming the legality of an agreement. Additionally, "compliance" is an antonym for def-easances, representing the adherence to legal agreements or regulations. On the other hand, "non-compliance" refers to the failure to follow legal agreements or rules. Finally, "validity" is another contrasting term for de-feasances, denoting the legal legitimacy or authenticity of an agreement.