Facetious

Facetious comes to us from Latin via French. It means jocular, waggish, merry, or jocose. It also means jocose at an inappropriate time. Jocular and jocose apparently share etymology with the word "joke."

Waggish is a synonym for facetious. Droll also. Waggish has a bit more pizzazz, though. Waggish means like a wag.

Wag means someone who likes jokes and humorous antics, a merry rogue.

Rogue means a vagabond, rascal, scoundrel, or someone who is mischievous or fun-loving.

And now back to the beginning:

Facetious is also an unusual word, in that it has all of the vowels of our alphabet in alphabetical order! I wonder if there are any others? Readers, let me know if you are aware of any.