Ask yourself wich company would want that name? I only see the creators of AngryBirds and they will not pay you but bring you to court to have it. If you just registered them, grace delete them to get a refund and register better names.
Before reg a name make a keyword search, if you see a brand name like ''nestle'', ''angry birds'' and etc DONT reg it. That's my personal way. More experienced domainers and useful threads here can give you more details on trademark issues.