Click Ignore or Ignore All to continue spell-checking without changing a certain word.
Select a word from the Suggestions list or type the correct word in the top text box, and then click Change to change only that occurrence of the misspelled word. You can also click Change All to change all occurrences of the misspelled word in your document.
Click Add to have Illustrator store an acceptable but unrecognized word in the dictionary so that subsequent occurrences are not considered misspellings.