noun
synesthesia
A neurological phenomenon where stimulation of one sensory pathway leads to automatic, involuntary experiences in a second sensory pathway (e.g., seeing colors when hearing music).
彼女は共感覚の持ち主で、音を聞くと色が見える。
She has synesthesia and sees colors when she hears sounds.
共感
Synesthesia is not a disease but is considered a characteristic of the brain.