coke vs cocain

coke and cocain both are nouns.

Word	Noun	Adjective	Verb	Adverb
coke	Yes	No	Yes	No
cocain	Yes	No	No	No

As nouns, cocain is a hypernym of coke; that is, cocain is a word with a broader meaning than coke:

coke: street names for cocaine
cocain: a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive

Other hypernyms of coke include cocaine.

coke (noun)	cocain (noun)
street names for cocaine	a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive
carbon fuel produced by distillation of coal

coke (verb)	cocain (verb)
become coke