Here are some of the most prominent resources I used when researching Biblical Universalism. I haven’t stopped my search of this topic and hope to write extensively on it in the future.
What Does "Aionion" Mean? – No Other Foundation (ancientfaith.com)
"Aionios" NEVER means "eternal" - The Narrow Path Ministries (theos.org)
What does AIONIOS mean (Gomorrah, Jehovah, Sodom, punishment) - Christianity - - City-Data Forum
The Book of Ages by Elwin R. Roach (godfire.net)
Ages or Eternity and the King James Version (tentmaker.org)
Bing Microsoft Translator - Translate from Greek to English
πῦρ (Ancient Greek): meaning, origin, translation - WordSense Dictionary
Matthew 25:41 (TR1894MR) - Biblia.com
Read the Bible text :: academic-bible.com
Disrupting The Foundations directory
Universal Restoration vs. Eternal Torment (Hell) Introduction - Berean Patriot
Does the Greek Word Aion Mean Eternity? | Tommy Redmon (mercyonall.org)
Strong's Greek: 165. αἰών (aión) -- a space of time, an age (biblehub.com)
Eternal - International Standard Bible Encyclopedia (biblestudytools.com)
Aion Meaning in Bible - New Testament Greek Lexicon - New American Standard (biblestudytools.com)
Universalism | Christianity | Britannica
Universalism: a historical survey by Richard Bauckham (theologicalstudies.org.uk)
Pur Meaning in Bible - New Testament Greek Lexicon - King James Version (biblestudytools.com)
Strong's Greek: 4442. πῦρ (pur) -- fire (biblehub.com)
πυρ | Abarim Publications Theological Dictionary (New Testament Greek) (abarim-publications.com)
On the Greek words for Eternity and Eternal (stempublishing.com)
The History of Universalism (Part Two) | Christian Universalist Association
Church Fathers on Universalism - Unsettled Christianity
Universalism and the Bible – Keith DeRose (yale.edu)
Origen the Universalist? – The Calvinist International
Justice — The Works of George MacDonald (worksofmacdonald.com)