secularism vs doctrine

secularism and doctrine both are nouns.

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

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

secularism: a doctrine that rejects religion and religious considerations
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school

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

secularism (noun)	doctrine (noun)
a doctrine that rejects religion and religious considerations	a belief (or system of beliefs) accepted as authoritative by some group or school