dance vs. dart, how to analyze?

I assume that even most of the authority of English, Western or Eastern, ignored or failed to find a conclusion in new depth in analysis of words, based on the fact of that no such an advanced book exists, although there are someone tried and made a promising but limited success.

Atleast for me, my understanding of these two words enable me to define my idea of beuty in art, directly helping me to refine my work.

So, how do you think of these two?