yakuza vs organized crime

yakuza and organized crime both are nouns.

Word	Noun	Adjective	Verb	Adverb
yakuza	Yes	No	No	No
organized crime	Yes	No	No	No

As nouns, organized crime is a hypernym of yakuza; that is, organized crime is a word with a broader meaning than yakuza:

yakuza: organized crime in Japan; an alliance of criminal organizations and illegal enterprises
organized crime: underworld organizations

Other hypernyms of yakuza include gangdom, gangland.

yakuza (noun)	organized crime (noun)
organized crime in Japan; an alliance of criminal organizations and illegal enterprises	underworld organizations
a Japanese gangster