Crosbill or Crossbill: How To spell?
The word Crosbill is misspelled against Crossbill, a noun meaning "A bill brought by a defendant, in an equity or chancery suit, against the plaintiff, respecting the matter in question in that suit."
Crossbill has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings cro & bill which should not be misspelled with single 'S'
Wrong Spelling:  cro-s-bill  Correct Spelling:  cro-ss-bill 
Find more incorrect spellings of Crossbill to spell right way.