knoblike

/ˈnɑbˌlaɪk/
adjective
  1. Resembling or shaped like a knob; having a rounded, protruding part.
    • She wore a necklace with knoblike beads of polished wood.
    • The end of the bone was knoblike, fitting neatly into the socket.
    • The cactus had a knoblike growth on its side.