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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Knots on tree trunks:

GNARL: Tree trunk knot
KNUR: Knot in tree trunk.
KNARS: Knots on tree trunks
BURL: Knot on a tree trunk.
GNARL: Knot in a tree trunk.
GNARL: Knot on a tree trunk.
GNARLIER: More knotted, as a tree trunk