Is shiny a synonym for bright?

Not exactly. While both "shiny" and "bright" can describe something that reflects light, they have different nuances:

* Shiny implies a smooth, reflective surface that reflects light in a concentrated way, creating a gleam or sparkle. Think of a polished metal or a freshly waxed car.

* Bright is a broader term that describes intense light and can apply to various sources, like the sun, a light bulb, or even colors. It doesn't necessarily imply a smooth surface.

Here's an example:

* A shiny diamond reflects light in a dazzling way.

* A bright star illuminates the night sky.

So, while "shiny" can be a type of "bright," they're not interchangeable.