The word Knaves is misspelled against Knavess, a noun meaning "A knavish woman."
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Knavess has double 'ss' in the end mispronounced as 's'
Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  knave-s 
Correct Spelling:  knave-ss 
Explore spell check of Knavess to spell without errors.