All and Sum

All adjective - Not divided or scattered among several areas of interest or concern.

Sum is a synonym for all in whole topic. In some cases you can use "Sum" instead the word "All" as a noun or a pronoun or an adjective, when it comes to topics like part, each, each one, whole amount.

Sum noun - A complete amount of something.

All is a synonym for sum in part topic. You can use "All" instead the word "Sum" as a noun or an adjective or a pronoun, if it concerns topics such as total.