You can't. Enumeration can hold only one name per value.
Enumeration is only usefull if you are typing SQL queries by hand, to help you understand what's going on. If you're not looking at the queries, then enum just wasts space and time, because SQL understands numeric values a lot better than ENUM names.
In PHP you can define constants to contain the values you use in the enumeration, or you can use a seperate tabel in the database to hold them, and JOIN them again when you do a select query.
Forget enum as quickly as possible.
A forum, a FAQ, email notification, what else do you need?