Joust and juxtapose share the same Latin root meaning "beside" — a joust is literally two knights coming together, meeting side by side at full gallop.
A medieval sporting contest in which two mounted knights charge at each other with lances, attempting to unseat their opponent; any competition or contest between two rivals.
From Old French joster, jouster (to joust, to tilt, to come together), from Vulgar Latin *iuxtāre (to come together, to approach), from Latin iuxtā (beside, near, close to), from Proto-Indo-European *yewg- (to join, to yoke). Key roots: *yewg- (Proto-Indo-European: "to join, to yoke").