
The nature of hyperbole is that people tend to exaggerate, and sometimes intentionally, so they will choose whichever word most effectively achieves the exaggeration they want to convey. It is of course possible to use the term hyperbolicly or mistakenly, which can diminish the effect, but I doubt you will find any word that lacks that particular problem.

More literally it derives from single, meaning one, so a singular phenomena is logistically something that is assessed as happening just once. Out of the usual course unusual, uncommon somewhat strange a little extraordinary: As a singular phenomenon.The Century Dictionary and Cyclopedia defines Singular as meaning: I thought it was something along the lines of singularity event, but that doesn't sound quite right. I can't pretend to understand the validity of the claims by the text, but the words they used to describe these events were quite clever (and scientific sounding) that it would make a fun hyperbole. Sample sentence: "The creation of the first organisms was incredibly unlikely, the event can be called a _ event, or an event that will likely never happen again." Basically, the text said that the scenario for the creation of the first living organism happened on a planet where conditions were just right by complete chance, and that the odds of this were so astronomical that it would likely never happen again anywhere in the universe over any length of time. The context I read these words in were the creation of the first life on earth (without any theological ideas).

I once read a book that used a word to describe an event that has happened in the past, but the odds were so astronomical that it will likely never happen a second time. I've read this question, but none of them are what I am looking for.
