No, I think that such tags would be too cryptic to be useful. Why hkjl instead of hjkl? Also, case-sensitivity is a problem. Furthermore, they either presuppose that the person asking the question knows the solution, or encourage the asker to ask an excessively narrow question.
I don't think that these make too much sense. They can be synonyms at some moment, but the primary tags should be descriptive, as you suggest: