expiry vs. expiration

noun

plural

expiries 
  1. expiration of breath.

  2. an end or termination, as of life or a contract.

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.