extender

noun6

1. •
   One who extends.

   • [Marc Jacobs] is a colonialist, an extender of brands, and in very good shape. — 2010
2. •
   Any of various substances designed to extend any of several properties of a material.

   • “Flour” routinely contained crushed stone or gypsum as a cheap extender. — 2018
3. •
   Any substance added to food to bulk it out, with a higher protein content than a filler.

   • Soy protein is used as a meat extender.
4. •
   Any of various components designed to extend the length of a device.
5. •
   A runner, or quick-draw.
6. •
   A phrase that extends an expression to include further members of a set, e.g. "and stuff", "or something".