Arroworm or Arrowworm: How To spell?
The word Arroworm is misspelled against Arrowworm, a noun meaning "A peculiar transparent worm of the genus Sagitta, living at the surface of the sea. See Sagitta."
Arrowworm has double "ww" is mispronounced as "w"Remember double 'WW' in between the strings arro & orm which should not be misspelled with single 'W'
Wrong Spelling:  arro-w-orm  Correct Spelling:  arro-ww-orm 
Find more incorrect spellings of Arrowworm to spell right way.