If you have some smaller ones, the not yet ripe ones are ideal for making glacé pears.
This will not work with ripe pears, they fall apart.
I also used to make Pear Mostarda, a wonderful condiment to serve with duck, pork, lamb, and game, especially venison and boar meat.
https://www.splendidtable.org/story/2016/06/07/pear-mostarda