doctrine vs ism

doctrine and ism both are nouns.

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

As nouns, doctrine and ism are synonyms defined as:

doctrine and ism: a belief (or system of beliefs) accepted as authoritative by some group or school

Other synonyms of doctrine include philosophical system, philosophy, school of thought.

doctrine (noun)	ism (noun)
a belief (or system of beliefs) accepted as authoritative by some group or school	a belief (or system of beliefs) accepted as authoritative by some group or school