knob (n.)
- anthill
- ball
- balloon
- barrow
- bilge
- bladder
- blain
- bleb
- blister
- blob
- boll
- bolus
- boss
- bow
- brae
- bubble
- bulb
- bulbil
- bulblet
- bulge
- bulla
- bump
- bunch
- burl
- butte
- button
- chine
- clump
- condyle
- dowel
- down
- drumlin
- dune
- ear
- ellipsoid
- fell
- flange
- flap
- gall
- globe
- globule
- glomerulus
- gnarl
- gob
- gobbet
- handle
- hill
- hillock
- hummock
- hump
- hunch
- jog
- joggle
- knoll
- knot
- lip
- loop
- lump
- mole
- molehill
- moor
- mound
- mountain
- nevus
- nub
- nubbin
- nubble
- orb
- orbit
- papilloma
- peg
- pellet
- pimple
- projection
- protrusion
- protuberance
- rib
- ridge
- ring
- rough
- shoulder
- sphere
- spheroid
- spherule
- spine
- stud
- style
- swell
- tab
- tubercle
- verruca
- vesicle
- wale
- wart
- welt
