Knopwed or Knopweed: How To spell?
The word Knopwed is misspelled against Knopweed, a noun meaning "Same as Knapweed."
Knopweed has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Knopw & d which should not be misspelled with single 'E'
Wrong Spelling:  Knopw-e-d  Correct Spelling:  Knopw-ee-d 
Find more incorrect spellings of Knopweed to spell right way.