The word Sterness is misspelled against Sternness, a noun meaning "The quality or state of being stern."
-->
Sternness has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings ster & ess which should not be misspelled with single 'N'
Wrong Spelling:  ster-n-ess 
Correct Spelling:  ster-nn-ess 
Explore spell check of Sternness to spell without errors.