The word Gleful is misspelled against Gleeful, an adjective meaning "Merry; gay; joyous."
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Gleeful has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings Gl & ful which should not be misspelled with single 'E'
Wrong Spelling:  Gl-e-ful 
Correct Spelling:  Gl-ee-ful 
Check more misspelled words of Gleeful to spell it correct.