Source : Webster's Revised Unabridged Dictionary (1913)

Hooper \Hoop"er\, n. [See 1st {Hoop}.]
   One who hoops casks or tubs; a cooper.

Hooper \Hoop"er\, n. (Zo["o]l.) [So called from its note.]
   The European whistling, or wild, swan ({Olor cygnus}); --
   called also {hooper swan}, {whooping swan}, and {elk}.