The word Portmantaus is misspelled against Portmanteaus, which is plural of "Portmanteau"
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Portmanteaus has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets portmant & us is misspelled as 'A'
Wrong Spelling:  portmant-a-us 
Correct Spelling:  portmant-ea-us 
Check more misspelled words of Portmanteaus to spell it correct.