1. (v. i.) To growl; to snarl.

2. (n.) a knot in wood; a large or hard knot, or a protuberance with twisted grain, on a tree.

anamorphism anamorphosis asymmetry bend bilge blain bleb blister blob boss bow bubble buckle bulb bulge bulla bump bunch burl button cahot chine clump coarsen color condyle contort contortion convex crook crookedness crumple detorsion deviation disproportion distort distortion dowel ear flange flap flush frown gall glare glower granulate growl grumble handle hill hiss horripilate hump hunch imbalance irregularity jog joggle knob knot knur knurl lip look daggers loop lopsidedness lower lump mantle mole mountain nevus nub nubbin nubble papilloma peg pimple quirk redden rib ridge ring rough rough up roughen scowl screw shoulder snap snarl spine spit spring stud style tab torsion tortuosity tubercle tubercule turn turn awry twist unsymmetry verruca vesicle wale warp wart welt wrench wrest wring writhe