Maybe something like that?
WORDLIST MyWordList = 'test_words.txt';
// Declaration of annotations for marked words
DECLARE MyAnnotation;
DECLARE CapitalizedAnnotation;
MARKFAST(MyAnnotation, MyWordList);
MyAnnotation CW[2,2]{-> CapitalizedAnnotation};
CW[2,2]{-> CapitalizedAnnotation} @MyAnnotation;