Burls, or burrs, are often found on trees and provide a unique aesthetic to woodwork. When trying to find synonyms for the word burls, one might consider using terms such as knots, gnarls, or whorls. These words describe the same type of growth found on trees, but offer slightly different nuances in meaning. A knot might refer to a tight, compact growth, while a gnarl might imply a more twisted and contorted appearance. Whorls suggest a circular or spiral pattern. All of these synonyms are helpful when seeking out descriptive language for the naturally occurring formations that can be found on trees.