Actually in keeping with the americium, californium, berkelium meme they should call it oakridgium. Where it goes from there (bonsallium, goldinium, ?) is anyone’s guess.
Oakridgium would be better. Tennessine is too similar to asinine.
In keeping with its place in the periodic table, they have to use the "-ine" suffix because it's a halogen. Fluorine, chlorine, bromine, iodine, astatine, and now tennessine.