Nicene Creed vs church doctrine

Nicene Creed and church doctrine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nicene Creed	Yes	No	No	No
church doctrine	Yes	No	No	No

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

Nicene Creed: (Christianity) a formal creed summarizing Christian beliefs; first adopted in 325 and later expanded
church doctrine: the written body of teachings of a religious group that are generally accepted by that group

Other hypernyms of Nicene Creed include creed, gospel, religious doctrine.

Nicene Creed (noun)	church doctrine (noun)
(Christianity) a formal creed summarizing Christian beliefs; first adopted in 325 and later expanded	the written body of teachings of a religious group that are generally accepted by that group