Suposal or Supposal: How To spell?
The word Suposal is misspelled against Supposal, a noun meaning "The act of supposing; also, that which is supposed; supposition; opinion."
Supposal has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings su & osal which should not be misspelled with single 'P'
Wrong Spelling:  su-p-osal  Correct Spelling:  su-pp-osal 
Check more misspelled words of Supposal to spell it correct.