[Den]

Synthesia: 1. A condition in which one type of stimulation evokes the sensation of another, as when the hearing of a sound produces the visualization of a color.
2. A sensation felt in one part of the body as a result of stimulus applied to another, as in referred pain.
3. The description of one kind of sense impression by using words that normally describe another.

For me, certain textures have a distinct mouth-feel and taste, even though I don't actually taste them. I experience the sensation of feeling those textures as though I'm tasting something metallic, usually coppery.