Ribed or Ribbed: How To spell?
The word Ribed is misspelled against Ribbed, an adjective meaning "Furnished or formed with ribs; as, a ribbed cylinder; ribbed cloth."
Ribbed has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Ri & ed which should not be misspelled with single 'B'
Wrong Spelling:  Ri-b-ed  Correct Spelling:  Ri-bb-ed 
Find more wrongly spelled words of Ribbed to spell it well.