In class, my teacher gives a simple sentence and we have to make up a paragraph or less to describe that simple sentence without saying the word "temper" in it.
The sentence is "He had a temper"
So I started mine off with this
Isaac came home and was furious when he lost the basketball game. He slammed his door and started to rage.
How else can I add on to this? I don't know if that is a good start
Here are some additional words to choose from ... you can use them in verb form or whatever form fits.
http://thesaurus.com/browse/irate
That's a great start to your paragraph! To further elaborate on the idea without using the word "temper," you can focus on describing Isaac's behavior and emotions in more detail. Here's an example of how you can continue your paragraph:
As Isaac's frustration grew, his face turned red, and his knuckles clenched tightly. His voice became loud and harsh, shouting words of disappointment and anger. The once calm atmosphere of his room transformed into chaos, with objects flying and crashing against the walls. To vent his rage, he kicked and stomped on anything in his path. It seemed as if an uncontrollable storm was brewing within him, engulfing the room in a tornado of emotions.
Remember, the key is to convey the idea of a strong reaction without explicitly using the word "temper."