I usually don't like nitpicking, but stoicism was a school of philosophy and a conception of the world, it doesn't have anything to do with the ability of enduring pain.
Making a few chain quizzes of my own (for TV Shows and a fewforPokémon) has taught me to appreciate this type of quiz a lot more. It's not as easy as it looks to link all the answers together by first and last letters.
sto·ic
ˈstōik/
noun
1.
a person who can endure pain or hardship without showing their feelings or complaining.
2.
a member of the ancient philosophical school of Stoicism.
adjective
1.
another term for stoical.
2.
of or belonging to the Stoics or their school of philosophy.