cartel vs drug cartel

cartel and drug cartel both are nouns.

Word	Noun	Adjective	Verb	Adverb
cartel	Yes	No	No	No
drug cartel	Yes	No	No	No

As nouns, drug cartel is a hyponym of cartel; that is, drug cartel is a word with a more specific, narrower meaning than cartel:

cartel: a consortium of independent organizations formed to limit competition by controlling the production and distribution of a product or service
drug cartel: an illicit cartel formed to control the production and distribution of narcotic drugs

Other hyponyms of cartel include oil cartel.

cartel (noun)	drug cartel (noun)
a consortium of independent organizations formed to limit competition by controlling the production and distribution of a product or service	an illicit cartel formed to control the production and distribution of narcotic drugs