The Collaborative International Dictionary of English v.0.48:
Howel \How"el\, n. A tool used by coopers for smoothing and chamfering rheir work, especially the inside of casks. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Howel \How"el\, v. t. To smooth; to plane; as, to howel a cask. [1913 Webster]