knob

A rounded protuberance.

A rounded handle, as on a drawer or door.

A rounded control switch or dial.

A prominent rounded hill or mountain.

A small flock, less than 30, of ducks: an English sporting-term.

To grow into knobs; bunch.

To produce a knob or knobs upon.

To free from knobs, as stone in the quarry, in rough-dressing it.

A rounded projection; a protuberance; a bunch; a knop.