The option that can be used as a one-word substitute for the given group of words is "Hyperbole."

Explanation of the options:

☀ Hypertext: Hypertext refers to a system of organizing and accessing information in a non-linear manner, typically through links between related content.

☀ Hypocrisy: Hypocrisy refers to the practice of professing beliefs or virtues that one does not actually hold or follow.

☀ Hippocrates: Hippocrates was a famous ancient Greek physician often referred to as the "Father of Medicine."

☀ Hyperbole: Hyperbole is an exaggerated statement or claim that is not meant to be taken literally. It is often used for emphasis, humor, or dramatic effect.