Topic on Extension talk:WikiEditor

I tried \bword\b but no luck.

There are two ways to match whole words: you can use \bword\b with the (.*) button selected (that makes the search use regex); or you can just type in word and select the button with the quote icon, which forces the search to match only full words.

Apparently it does not appear to work for non-Latin characters, i.e. Greek. Test with these: λέξη, λέξης, αλέξης.