possibilium

As nouns the difference between terms and possibilium

is that terms is while possibilium is (philosophy) something that is possible.

In philosophy terms the difference between possibilium and possibilism

is that possibilium is something that is possible while possibilism is the belief that possible things exist.

As nouns the difference between possible and possibilium

is that possible is a possible one while possibilium is (philosophy) something that is possible.

As an adjective possible

is (usually|not comparable) able but not certain to happen; neither inevitable nor impossible.