Romy; I had to go look up -- I used Wicki; hope it wasn't too far off.
Interesting phenomenon. Are all words visual? What do you experience when people say bad words? Nice words?
I'm very curious, I think it sounds wonderful (but perhaps not for you; just the idea of tangible words is fascinating.)
Personally I really like it, and can't imagine how I could manage to function if I suddenly woke up one day without it.
My neurologist told me that it's basically a permanent LSD trip, lol. He said LSD does the exact same thing to people with normal brains.
Pretty much, all colors and sounds have letters, and when people combine them into words it makes a colorful abstract looking picture. The actual look of it spoken is influenced by volume, the quality of the speakers voice, and the language spoken. Different languages have different palettes. It's really difficult to understand the lyrics of songs, because the words and the music blend together into pretty nonsense (sometimes not so pretty, lol).
The biggest drawback has been with having PTSD, there was a lot of stimulation during the trauma that seemingly had nothing to do with it, but was tied in with the sensory input I got when it happened. And so a lot of the triggers seemed very random and like they had nothing to do with what happened. The doctors all agree that I wouldn't be nearly as bad off if I didn't have the synesthesia making everything extra vivid.
"Bad" words vs. "good" words don't really have a different quality to them by themselves. The F bomb looks like one of those giant swirly lollipops with blue yellow and white, so not like an evil cloud of death or anything. When words are said with malice, the person's voice definitely changes the quality to a coarser darker tone. Mainly in my case it is the associations that my brain has made with them, they became triggers and I try to avoid them on difficult days.
My friends make fun of me because I always picked hot actors based on their voices. IMO, Alan Rickman is the hands down best because his voice looks like mercury. He could come to my house and just read from the phone book for hours, I would love it. My secret dorkiness is revealed, lol.