Archaian or Archaean: How To spell?
The word Archaian is misspelled against Archaean, a noun meaning "The earliest period in geological period, extending up to the Lower Silurian. It includes an Azoic age, previous to the appearance of life, and an Eozoic age, including the earliest forms of life."
Archaean has vowels 'ae' together mispronounced as 'ai'Word contains consecutive vowels 'AE' in between alphabets arch & an is misspelled as 'AI'
Wrong Spelling:  arch-ai-an  Correct Spelling:  arch-ae-an 
Find more wrongly spelled words of Archaean to spell it well.