Formal:
* Humorous: This is the most straightforward and direct term.
* Witty: Implies intelligence and cleverness in the humor.
* Facetious: This term can also suggest a playful or lighthearted approach to humor.
* Jocular: Implies a cheerful and playful humor.
* Droll: Implies a dry, often understated humor.
Informal:
* Funny: This is the most common and casual term.
* Hilarious: Indicates very funny, often to the point of laughter.
* Amusing: Suggests something mildly funny and enjoyable.
* Side-splitting: Implies humor that is extremely funny, causing uncontrollable laughter.
The best term to use depends on the context and the specific type of humor you're describing.