Actuality, is often used to translate both energeia and entelecheia (sometimes rendered in English as "entelechy"). "Actuality" comes from Latin actualitas and is a traditional translation, but its normal meaning in Latin is "anything which is currently happening".
The two words energeia and entelecheia were coined by Aristotle, and he stated that their meanings were intended to converge. In practice, most commentators and translators consider the two words to be interchangeable. They both refer to something being in its own type of action or at work, as all things are when they are real in the fullest sense, and not just potentially real. For example, "to be a rock is to strain to be at the center of the universe, and thus to be in motion unless constrained otherwise".
Read more about this topic: Potentiality And Actuality