They are common errors in LDS and gospel vernacular.
This is one writer's feeble attempt to identify a few of them and to set the record straight. I fully expect it will be universally ignored. Nevertheless, I press forward.
Incorrect: prophesy (as a noun)
Incorrect: prophecy (as a verb)
Incorrect: Book of Revelations (in the plural)
Correct: Book of Revelation (in the singular)