A comparison that does not use “like” or “as” is known as a metaphor. Why? Well, the definitions listed below are self explanatory:
Hyperbole: A hyperbole is an extreme exaggeration in which something seems more drastic than it is. An example would be as follows, “ I am so hungry I could eat the entire house right now!” This is a hyperbole because the person mentioned is trying to emphasize the fact they’re really hungry. I’m reality, the person cannot eat an entire house which makes this an exaggeration.
Onomatopoeia: Onomatopoeia is an instance used where events or objects are imitated by real sounds to add expression and realism to what is happening. An example of onomatopoeia would be as follows, “ The fireworks were crazy last night! I could not sleep because of the boom it made outside of my house!” This is an example of onomatopoeia because fireworks imitate the sounds of real explosives, as if they are going off or being detonated.
Metaphor: A metaphor is a comparison between two or more objects that does not use “like” or “as” and rhetorically refers one thing to another. An example of a metaphor would be as follows, “ I am feeling blue today.” This is a metaphor because “like” and “as” are both unused, and blue refers to somebody feeling sad. The person physically cannot feel the color blue, which makes this a metaphor.
Simile: A simile is a phrase that, using “like” or “as,” compares two or more events. An example of a simile would be as follows, “ That student behaves as poorly as a patch of non-genetically modified oranges.” This is a simile because using “as,” a misbehaving student is compared to a patch of non-genetically modified oranges.
Your final answer: A metaphor. If you need to better understand it, let me know and I will gladly assist you!