I'm getting a green squiggly line under a certain word because Word thinks I should use a semicolon instead of a comma after this word. I don't want to use a semicolon in this situation and do not think it is grammaticaly necessary.

Word gives me the option of "ignoring once" but then it puts the green line back. I don't want to turn off the grammer check. Is there any way I can get rid of this annoying green line without changing the comma to a semicolon.