The word Platnes is misspelled against Platness, a noun meaning "Flatness."
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Platness 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:  platne-s 
Correct Spelling:  platne-ss 
Explore spell check of Platness to spell without errors.