Two words used side-by-side that have opposite meanings. (E.G.: It is a definite possibility that we'll get rain today.)
Allusion
A play on words that is meant to be humorous. (E.G.: I thought the baseball was getting bigger, then it hit me.)
The use of repetitive syntax (sentence structure) to make a point. (E.g. I came, I saw, I conquered.)
Hyperbole
A group of words that means something completely different together than apart. (Ex.: Jane is on thin ice in at home.)
Overstatement
To make something bigger than it is. (E.G.: The mouse was three feet long!)
Pun
Idiom
Extreme exaggeration for effect.
Understatement
Trying to downplay something for dramatic or comedic effect. (E.G. "We teachers are rather good at magic, you know," Professor McGonogall said.)
Parallelism
A reference within a story to another story, song, or poem.
Oxymoron