I once had an opportunity to compare apples to apples with about 13 Institute directors (those who lead Standard Works' studies @ LDS facilities located near college campuses) in an unusual dialogue.
We were discussing the BoM's use of the terms "eternal" and "everlasting" as applied to the afterlife. Now why is such a study of those words so fascinating?
Simple. In the BoM, those words are often the adjectives used to describe heaven. Guess what? Those same exact words are used to describe hell in the BoM, too. So what? you may say.
The "so what" is this: The entire genealogical/baptism for the dead enterprise w/in the LDS church is built upon the premise that hell won't be eternal or everlasting for just about everybody. Just about everybody is going to go to at least the third degree of heaven; baptism for the dead is founded upon the idea that folks can get out of (temporary) spirit prison by baptizing them by proxy.
But if hell is temporary and not eternal or everlasting, you can't play with words. That means heaven is temporary, too.
The bottom line? Let's go with what Jesus said: "Wide is the road that leads to destruction, narrow is the way to life" (Matthew 7:13)