secessionism vs ism

secessionism and ism both are nouns.

Word	Noun	Adjective	Verb	Adverb
secessionism	Yes	No	No	No
ism	Yes	No	No	No

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

secessionism: a doctrine that maintains the right of secession
ism: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of secessionism include doctrine, philosophical system, philosophy, school of thought.

secessionism (noun)	ism (noun)
a doctrine that maintains the right of secession	a belief (or system of beliefs) accepted as authoritative by some group or school