What is another word for suncatcher?

There isn't one single perfect synonym for "suncatcher," as it depends on what aspect of the object you want to emphasize. However, here are some options:

General:

* Light catcher

* Prism

* Window ornament

* Crystal ornament

* Decorative glass

Emphasis on light:

* Light diffuser

* Rainbow maker

* Light refractor

Emphasis on the material:

* Crystal

* Glass ornament

* Dichroic glass

Emphasis on function:

* Window decoration

* Art object

The best word to use depends on the specific context. If you are writing about the object's ability to catch and refract light, "light catcher" or "prism" might be good choices. If you are focusing on its decorative function, "window ornament" or "crystal ornament" could be better.