Eternal Security
Eternal Security describes a belief similar to OSAS and John Calvin's "Perseverence of the Saints" from his TULIP model. It describes the concept where it is impossible for someone to lose their salvation, because their security im being saved rests in the eternal nature of the Holy Spirit dwelling within them.
The irony with Christian Universalists camps who believe in this, such as Gary Amirault from Tentmaker.org, is there constant Ancient Hebrew an Koine Greek discussions on the word inflectionsfor Olam from the Tanakh and Aion(ios) from the New Testament respectively. They argue that, the word "eternal" which describes eternal punishment is not actually referring to "forever or perpetual" but rather "agelasting or age-enduring or pertaining to an age(s)". Not only does this accidentally serve to debunk verses that use aion inflections to describe eternal characteristics of God, or eternal life, but it also debunks the name "eternal security" itself. Since by their very definition, eternal security is not actually eternal, but rather agelasting security, age-enduring security, or pertaining to an age(s) security.