Multiple choice Directions: Choose the option which is not the synonym of the word in question: knob protrusion crave protuberance bump Reveal answer Fill a bubble to check yourself B Correct answer Explanation Knob means a rounded protrusion, bump, or protuberance. Crave means to desire strongly or want something eagerly - unrelated to physical protrusions. The other options (protrusion, protuberance, bump) all mean a raised or projecting part.