expiry vs. expiration

expiry

noun

plural expiries.
  1. expiration of breath.
  2. an end or termination, as of life or a contract.

expiration

noun

  1. a coming to an end; termination; close:

    the expiration of a contract.

  2. the act of expiring, or breathing out; emission of air from the lungs.
  3. Archaic. death.