The word Stepness is misspelled against Steepness, a noun meaning "Height; loftiness."
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Steepness has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings St & pness which should not be misspelled with single 'E'
Wrong Spelling:  St-e-pness 
Correct Spelling:  St-ee-pness 
Explore spell check of Steepness to spell without errors.