humanitarian vs humanitarianism

humanitarian and humanitarianism both are nouns.

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

humanitarian (noun)	humanitarianism (noun)
someone devoted to the promotion of human welfare and to social reforms	the doctrine that people's duty is to promote human welfare
an advocate of the principles of humanism; someone concerned with the interests and welfare of humans

humanitarian (adjective)	humanitarianism (adjective)
of or relating to or characteristic of humanitarianism
marked by humanistic values and devotion to human welfare