theological doctrine vs ism

theological doctrine and ism both are nouns.

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

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

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

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

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