Chaldeusm or Chaldaism: How To spell?
The word Chaldeusm is misspelled against Chaldaism, a noun meaning "An idiom or peculiarity in the Chaldee dialect."
Word contains consecutive vowels 'AI' in between alphabets chald & sm is misspelled as 'EU'Wrong Spelling:  chald-eu-sm  Correct Spelling:  chald-ai-sm 
Check more misspelled words of Chaldaism to spell it correct.