burls

[burl.n.01] as in: the wood cut from a tree burl or outgrowth; often used decoratively in veneer

[burl.n.02] as in: a large rounded outgrowth on the trunk or branch of a tree

[slub.n.01] as in: soft lump or unevenness in a yarn; either an imperfection or created by design

[burl.v.01] as in: remove the burls from cloth

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