The word Decreused is misspelled against Decreased, which is past tense of "Decrease"
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Decreased has vowels 'ea' together mispronounced as 'eu'
Word contains consecutive vowels 'EA' in between alphabets decr & sed is misspelled as 'EU'
Wrong Spelling:  decr-eu-sed 
Correct Spelling:  decr-ea-sed 
Check more misspelled words of Decreased to spell it correct.