states' rights vs ism

states' rights and ism both are nouns.

Word	Noun	Adjective	Verb	Adverb
states' rights	Yes	No	No	No
ism	Yes	No	No	No

As nouns, ism is a hypernym of states' rights; that is, ism is a word with a broader meaning than states' rights:

states' rights: a doctrine that federal powers should be curtailed and returned to the individual states
ism: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of states' rights include doctrine, philosophical system, philosophy, school of thought.

states' rights (noun)	ism (noun)
the rights conceded to the states by the United States constitution	a belief (or system of beliefs) accepted as authoritative by some group or school
a doctrine that federal powers should be curtailed and returned to the individual states