The word Effosion is misspelled against Effossion, a noun meaning "A digging out or up."
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Effossion has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings effo & ion which should not be misspelled with single 'S'
Wrong Spelling:  effo-s-ion 
Correct Spelling:  effo-ss-ion 
Find more incorrect spellings of Effossion to spell right way.