humanitarianism vs humanism

humanitarianism and humanism both are nouns.

Word	Noun	Adjective	Verb	Adverb
humanitarianism	Yes	No	No	No
humanism	Yes	No	No	No

As nouns, humanitarianism and humanism are synonyms defined as:

humanitarianism and humanism: the doctrine that people's duty is to promote human welfare

humanitarianism (noun)	humanism (noun)
the doctrine that people's duty is to promote human welfare	the doctrine emphasizing a person's capacity for self-realization through reason; rejects religion and the supernatural
	the doctrine that people's duty is to promote human welfare
	the cultural movement of the Renaissance; based on classical studies