Update on that.
I have found here a workaround: http://www.jqueryscript.net/demo/jQuery-Plugin-To-Select-Single-Word-Within-An-Element-GetWordByEvent/
You only havbe to download jquery.get-word-by-event.js and modify the card a little...
example:
<html>
<head>
<title>GetWordByEvent jQuery plugin example</title>
</head>
<body>
<blockquote id="click-text">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</blockquote>
<script type="text/javascript" src="./GetWordByEvent jQuery plugin example_files/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="./GetWordByEvent jQuery plugin example_files/jquery.get-word-by-event.js"></script>
<script type="text/javascript">
// <![CDATA[
$('#click-text').getWordByEvent('click', function(event, word) {
alert(word);
});
// ]]>
</script>
</body>
</html>
I will try to have a look tomorrow. Should not be very difficult to implement. Anyway the like instead of the contains is still a problem.