humanitarianism vs humanitarian

humanitarianism and humanitarian both are nouns.

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

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

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