bennie vs amphetamine

bennie and amphetamine both are nouns.

Word	Noun	Adjective	Verb	Adverb
bennie	Yes	No	No	No
amphetamine	Yes	No	No	No

As nouns, amphetamine is a hypernym of bennie; that is, amphetamine is a word with a broader meaning than bennie:

bennie: a form of amphetamine
amphetamine: a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression

Other hypernyms of bennie include pep pill, speed, upper.

bennie (noun)	amphetamine (noun)
a form of amphetamine	a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression