After and For

After adjective - Being at or in the part of something opposite the front part.

For is a synonym for after (North American) in beside topic. In some cases you can use "For" instead a preposition "After", when it comes to topics like by, with the same name as.

For conjunction - For the reason that.

After is a synonym for for in beside topic. You can use "After" instead a preposition "For", if it concerns topics such as by, in consideration of.