Synset
a small lump or protuberance
<noun.shape>
nub
nubble
lexical pointers
derivationally related form
nubby
lexical pointers
derivationally related form
nubbly
semantic pointers
hypernym
bulge, protuberance, bump, hump, swelling, gibbosity, gibbousness, jut, prominence, protrusion, extrusion, excrescence