precept vs doctrine

precept and doctrine both are nouns.

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

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

precept: a doctrine that is taught
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school

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

precept (noun)	doctrine (noun)
a doctrine that is taught	a belief (or system of beliefs) accepted as authoritative by some group or school
rule of personal conduct