- burl - the wood cut from a tree burl or outgrowth; often used decoratively in veneer
--1 is a kind of wood
--1 is a substance of burl- burl - a large rounded outgrowth on the trunk or branch of a tree
--2 is a kind of plant process, enation
--2 is a part of tree
--2 has substance: burl- slub, knot, burl - soft lump or unevenness in a yarn; either an imperfection or created by design
--3 is a kind of roughness
Derived form: verb burl1 - burl - a large rounded outgrowth on the trunk or branch of a tree