Nouns

(n)burlthe wood cut from a tree burl or outgrowth; often used decoratively in veneer
(n)burla large rounded outgrowth on the trunk or branch of a tree
(n)slub, knot, burlsoft lump or unevenness in a yarn; either an imperfection or created by design

Verbs

(v)burlremove the burls from cloth