Even if Im not using the name in my domain website?
What I want, is to say in my descriptions something like “large scrabble tiles for sale”
They are not "Scrabble" tiles unless they are marketed by Hasbro. They are tiles with letters. Scrabble is a registered trademark.
Whether using lowercase "scrabble" to describe your tiles infringes on Hasbro's trademark rights is for Hasbro to decide - and their decision is apt to come as a cease and desist letter, removal of your product from its place online and, potentially, a trademark infringement lawsuit seeking any of your profits, any demonstrable losses it has suffered, and a seizure of your remaining inventory.
Trademark law centers on consumer confusion and if a consumer confuses your product with a Hasbro-affiliated product (or is likely to be confused), there is the basis for a lawsuit. If your tiles affect the value of or market for the Hasbro product, there is the basis for a lawsuit.
It is up to a trademark holder to enforce their rights. If or how they do this is up to them.