of nouns
1. Act or action: cannonade.
2. A person or group concerned in an action or process: cavalcade.
3. Product of an action or process: lemonade. [<F -ade <Provengal, Pg., or Sp. -ada or Ital. -ata <L -ata, fem. pp. ending]

suffix
of nouns Relating to; pertaining to: decade. The more common English form of this suffix is -ad. See -AD¹ [<F -ade <Gk. -as,-ados]

(ād), George,
1866–1944, U.S. humorist.