Gigantaun or Gigantean: How To spell?
The word Gigantaun is misspelled against Gigantean, an adjective meaning "Like a giant; mighty; gigantic."
Gigantean has vowels 'ea' together mispronounced as 'au'Word contains consecutive vowels 'EA' in between alphabets gigant & n is misspelled as 'AU'
Wrong Spelling:  gigant-au-n  Correct Spelling:  gigant-ea-n 
Check more misspelled words of Gigantean to spell it correct.