Whats the difference between Publish/Activate/Replicate ?

For a person who is a beginner in AEM or just started using it will sometimes get confused with these three things:-

When someone says Publish a page [OR]
When someone says Activate a page [OR]
When someone says Replicate a page to publish.

Actually, these three terms mean the same thing which is pushing data to publish instance or making a page available in author to publish instance.
Publish / Unpublish
These are general terms used by everybody to make your content in the author to be publicly available in the publish environment.
Activate / Deactivate
These terms are synonymous with publish/unpublish and meaning is the same as Publish / Unpublish. They are more common in the classic UI and can be accessed from siteadmin or sidekick commonly.
Replicate / Replication
These are the technical terms used to indicate the movement of data (e.g. page content, files, code, user comments) from one environment to another; i.e. when publishing, or reverse-replicating user comments.

As said meaning is the same, but the only difference I have seen is who is actually saying these terms or using it. Business Analyst uses Publish, the people who are a bit technical like developers used to activate/replicate. All these interchangeable