Fancy words can add a unique touch to an essay, making it more interesting and enjoyable to read. By using words that are more specific and precise than everyday language, the writer can better convey the message they intend to deliver. There are many words out there that can be used to make an essay stand out. Here are some examples:

1. 'Conundrum': This refers to a problem with no definite solution. This can be used when discussing a dilemma or complicated issue.

2. 'Approbation': This word means approval or praise. It can be used to highlight a person's achievements or describe a situation in a positive light.

3. 'Ubiquitous': This means something that is omnipresent or everywhere. This can be used to emphasize the widespread nature of a concept or idea.

4. 'Enigmatic': This word refers to something that is mysterious or hard to understand. It can be used to refer to a difficult problem or situation.

5. 'Laconic': This means something that is brief and to the point. It can be used when the writer wants to get an idea across without using too many words.

By using these fancy words, an essay can have its own distinct style and feel. They can also be useful in making points more clearly and concisely. As such, they can be great additions to any essay.