religious doctrine vs doctrine

religious doctrine and doctrine both are nouns.

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

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

religious doctrine: the written body of teachings of a religious group that are generally accepted by that group
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school

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

religious doctrine (noun)	doctrine (noun)
the written body of teachings of a religious group that are generally accepted by that group	a belief (or system of beliefs) accepted as authoritative by some group or school