tournament vs joust

tournament and joust both are nouns.

Word	Noun	Adjective	Verb	Adverb
tournament	Yes	No	No	No
joust	Yes	No	Yes	No

tournament (noun)	joust (noun)
a sporting competition in which contestants play a series of games to decide the winner	a combat between two mounted knights tilting against each other with blunted lances
a series of jousts between knights contesting for a prize

tournament (verb)	joust (verb)
	joust against somebody in a tournament by fighting on horseback