Natural process and Physical process

Natural process noun - A process existing in or produced by nature (rather than by the intent of human beings).

Physical process and natural process are semantically related. In some cases you can use "Physical process" instead a noun phrase "Natural process".

Physical process noun - A sustained phenomenon or one marked by gradual changes through a series of states.

Natural process and physical process are semantically related. Sometimes you can replace phrase "Natural process" with "Physical process", this phrases are similar.