Silyhow or Sillyhow: How To spell?
The word Silyhow is misspelled against Sillyhow, an adjective meaning "A caul. See Caul, n., 3."
Sillyhow has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings si & yhow which should not be misspelled with single 'L'
Wrong Spelling:  si-l-yhow  Correct Spelling:  si-ll-yhow 
Find more incorrect spellings of Sillyhow to spell right way.