Most Christian Universalists have observed, as I, that the Greek word "aion" is at times wrongly translated "eternal" in the English Bible when the meaning can also be "age", "life", "entire", "complete", and "world". To help your own study I have used the http://www.blueletterbible.org to find every usage of the Greek words "aion," "aionios," and "aidios" in the New Testament.
aion: Strong's G165 occurs 128 times in 102 verses in the Greek concordance.
aionios: Strong's G166 occurs 71 times in 69 verses in the Greek concordance.
aïdios: Strong's G126 occurs 2 times in 2 verses in the Greek concordance.
My online chart lists the references to these Greek words in the World English Bible and the Young's Literal Translation along with my notes. This may help your own study of this fascinating word. Download all the New Testament 'AION' verses at...
My articles Forever Is Not Forever? You Gotta Be Kidding Me! and Forever Is Not Forever? You Still Gotta Be Kidding Me! also offer my understanding of this important subject.