Knoby or Knobby: How To spell?
The word Knoby is misspelled against Knobby, an adjective meaning "Abounding in rounded hills or mountains; hilly."
Knobby has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Kno & y which should not be misspelled with single 'B'
Wrong Spelling:  Kno-b-y  Correct Spelling:  Kno-bb-y 
Find more incorrect spellings of Knobby to spell right way.