Knob /(?)/

Knob

n.
  1. A hard protuberance; a hard swelling or rising; a bunch; a lump; as, a knob in the flesh, or on a bone.
  2. A knoblike ornament or handle; as, the knob of a lock, door, or drawer.
  3. A rounded hill or mountain; as, the Pilot Knob. [U. S.]
  4. See Knop. (Arch.)

Phrases & Compounds
Knob latch
a latch which can be operated by turning a knob, without using a key.

Knob

v. i.
  1. To grow into knobs or bunches; to become knobbed. [Obs.]