For something amazing, impressive, or extraordinary:
* Génial: This is the most common and versatile option, similar to "awesome" in everyday speech.
* Extraordinaire: This implies something truly exceptional or remarkable.
* Fantastique: This conveys a feeling of wonder and amazement.
* Superbe: This refers to something beautiful, impressive, and grand.
For something cool, cool, or great:
* Sympa: This is more casual and means "nice" or "cool."
* Chouette: This is another slang term for "cool" or "great."
* Bien: This is a general term for "good" or "great," but can also be used for something cool.
For something funny or hilarious:
* Marrant: This means "funny" or "amusing."
* Drôle: This is more formal and means "funny" or "humorous."
The best French word to use depends on the specific context and meaning you want to convey.