--> Forepossessed has double 'ss' twice appearing mispronounced as 's'
Remember double 'SS' appears twice in this word which should not be misspelled with single 'S'
Wrong Spelling:  forepo-s-e-s-ed 
Correct Spelling:  forepo-ss-e-ss-ed 
Find more incorrect spellings of Forepossessed to spell right way.