The Aether is a mysterious force that existed before the birth of the Nine Realms. It is known to be able to convert matter into dark matter, and otherwise maintains an almost lifelike existence that causes it to bond in a parasitic fashion to a living host. Once bonded, the energies of the Aether slowly consume any mortal host, and also have a volatile and deadly effect on any who come into contact with the host in a manner that the Aether perceives as threatening. Bonded with a stronger host that understands its power, the Aether can be employed as a weapon where it lashes out with a concussive force, or reaches out to convert matter.
In Thor: the Dark World the Aether is an Infinity Stone which can destroy the universe when an event called the Convergence happens. Unlike the others however it exists is a liquid state says the Marvels Wikia.
We already know that it cannot be destroyed and can live in someone’s body, but is there a power equivalent to the Aether?
In my opinion maybe one of the other Infinity Stones has equivalent power, but I’m just asking because I don't know much about Thor, I do not know much about Infinity Stones and the Marvel Wikia doesn't really help.