Do you know any API to get a list of words ending with a pattern?
Like this: http://www.morewords.com/ends-with/or/
but as an API (JSON if possible)
Could you use this API?
http://developer.wordnik.com/smartwords/v1.0
Looks nice and clean and supports json ! :)
Update 16/07/2015
Looks like that exact API no longer exists, they still have an API, that you can see and test here:
http://developer.wordnik.com/docs.html
But I don't know if it'll still provide what the OP required.