I don't think there is, but my friend's wife seemed to have taken offense when I called it a cockroach.
We always called them roaches growing up. I heard the Palmetto bug term, but nobody I knew called them that.
That’s kind of like saying that we called soft drinks soda or pop. No we didn’t. Everything was Coke. We always say said, “what kind of Coke do you want? Coke, Crush, Sprite, Mountain Dew?” We never said “soda” or “pop”. They were all Coke.
I know. Southerners are a little weird. Well, we think all of y’all are a little weird, too. ;)