Mythomane (noun)
mith-o-mayn
A mythomaniac, someone obsessed with mythology.
1950s; earliest use found in Encounter. From French mythomane from mytho- + -mane.
Example sentences
“He’s such a mythomane and he’s obsessed with dragons.”

Soigné (adj) swahn-yay Carefully or elegantly done, operated, or designed First recorded in 1915–20. Borrowed directly from French; originally from soin, meaning “care.” (more…)
I thought mythomane would be a new hydrocarbon or something.