The word Drowsines is misspelled against Drowsiness, meaning "feeling sleepy half asleep"
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Drowsiness 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:  drowsine-s 
Correct Spelling:  drowsine-ss 
Find more incorrect spellings of Drowsiness to spell right way.