Impercaivable or Imperceivable: How To spell?

The word Impercaivable is misspelled against Imperceivable, an adjective meaning "Imperceptible."

Word contains consecutive vowels 'EI' in between alphabets imperc & vable is misspelled as 'AI'
Wrong Spelling:  imperc-ai-vable 
Correct Spelling:  imperc-ei-vable 
Find more wrongly spelled words of Imperceivable to spell it well.