tourney vs tournament

tourney and tournament both are nouns.

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

As nouns, tourney and tournament are synonyms defined as:

tourney and tournament: a sporting competition in which contestants play a series of games to decide the winner

tourney (noun)	tournament (noun)
a sporting competition in which contestants play a series of games to decide the winner	a sporting competition in which contestants play a series of games to decide the winner
	a series of jousts between knights contesting for a prize

tourney (verb)	tournament (verb)
engage in a tourney