Scrabble website

Hello,

I want a website similar to
s c r a b b l e w o r d f i n d e r . o r g
s c r a b b l e - s o l v e r . c o m

Features:
All features that the above two sites have.
Ability to add new words to the list from the backend

Language: PHP
Mobile first, simple layout is fine.
Secured