Synonyms:
* Amusing: evoking laughter or amusement
* Humorous: containing or using humor
* Funny: causing amusement or laughter
* Whimsical: playful and unpredictable
* Quirky: odd or peculiar in a way that is appealing
* Wry: using humor to express a dry or ironic comment
* Facetious: treating serious issues with humor
* Comical: funny or amusing
* Ludicrous: ridiculous or absurdly funny
Related Words:
* Jocular: characterized by joking
* Jocose: funny and playful
* Satirical: using humor to criticize
* Parodic: imitative of a particular style or work, especially for comic effect
* Banter: light-hearted and teasing conversation
* Witty: characterized by humor and cleverness
The best synonym for "droll" will depend on the specific context of how it is used.