Thread:Jester of chaos/@comment-25886777-20150831000914/@comment-4708882-20150831004141

That's basically it:

Cosmic Entities - Basically godlike creatures or so highly advanced aliens that they could easily be mistaken as it by early humans. These are generally not worshiped supernatural being or if worshipped they are like the Asgardians in the movies: So highly advanced aliens with magic (or at least what seems to be magic if your a believer of magic just being science we don't yet understand) who carry what is considered godlike attributes ex: immortality or so slow aging not all that apparent to lesser beings and superhuman attributes.

Deities - Supernatural creatures who hold vast godlike powers (amout varies) and was or is worshipped by the setting. Generally these powers are often traditional powers we consider almighty or at least so much they could easily far beyond what we can hope to achieve naturally. This one is very close to Cosmic Entities and is very easy to mistaken a key difference is often the worship if both are truly supernatural being and not the super advanced alien form of Cosmic Entities.

Supreme Being - They create the universe or minimum the sole creator of a world. These like the others has godlike abilities but often to a much higher degree and are the strongest being within the settings (With very very few exceptions). These don't seem to be as common in fiction as most don't seem to want to piss off or push boundaries with religious groups.

I hope this has helped some with understanding the difference.