positivist vs positivism

positivist and positivism both are nouns.

Word	Noun	Adjective	Verb	Adverb
positivist	Yes	Yes	No	No
positivism	Yes	No	No	No

positivist (noun)	positivism (noun)
someone who emphasizes observable facts and excludes metaphysical speculation about origins or ultimate causes	a quality or state characterized by certainty or acceptance or affirmation and dogmatic assertiveness
	the form of empiricism that bases all knowledge on perceptual experience (not on intuition or revelation)

positivist (adjective)	positivism (adjective)
of or relating to positivism