secular humanism vs doctrine

secular humanism and doctrine both are nouns.

Word	Noun	Adjective	Verb	Adverb
secular humanism	Yes	No	No	No
doctrine	Yes	No	No	No

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

secular humanism: the doctrine emphasizing a person's capacity for self-realization through reason; rejects religion and the supernatural
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school

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

secular humanism (noun)	doctrine (noun)
the doctrine emphasizing a person's capacity for self-realization through reason; rejects religion and the supernatural	a belief (or system of beliefs) accepted as authoritative by some group or school