The Collaborative International Dictionary of English v.0.48:

Kevel \Kev"el\, n. [Prov. E. kevil, cavel, rod, pole, a large
   hammer, horse's bit; cf. Icel. kefli cylinder, a stick,
   mangle, and Dan. kievle a roller.]
   1. (Naut.) A strong cleat to which large ropes are belayed.
      [1913 Webster]

   2. A stone mason's hammer. [Written also cavil.]
      [1913 Webster]

   Kevel head (Naut.), a projecting end of a timber, used as a
      kevel. Kevel

The Collaborative International Dictionary of English v.0.48:

Timberhead \Tim"ber*head`\, n. (Naut.)
   The top end of a timber, rising above the gunwale, and
   serving for belaying ropes, etc.; -- called also kevel
   head.
   [1913 Webster]