What is another word that means handwriting skill begins and ends in the same letter?

There isn't a single word that perfectly describes handwriting that begins and ends with the same letter. However, you could use a phrase like:

* Circular handwriting

* Repetitive letter handwriting

* Closed-loop lettering

These phrases capture the idea of the handwriting forming a complete circle or loop, which is implied by starting and ending with the same letter.

You could also use a descriptive phrase like:

* Handwriting with a symmetrical structure

* Handwriting with a circular motif

Ultimately, the best way to describe this handwriting style depends on the specific context and the desired level of formality.