Archeosm or Archaism: How To spell?

The word Archeosm is misspelled against Archaism, meaning "Obsolescence."

Word contains consecutive vowels 'AI' in between alphabets arch & sm is misspelled as 'EO'
Wrong Spelling:  arch-eo-sm 
Correct Spelling:  arch-ai-sm 
Find more incorrect spellings of Archaism to spell right way.

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