positivist vs rationalist

positivist and rationalist both are nouns.

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

As nouns, positivist and rationalist are synonyms defined as:

positivist and rationalist: someone who emphasizes observable facts and excludes metaphysical speculation about origins or ultimate causes

positivist (noun)	rationalist (noun)
someone who emphasizes observable facts and excludes metaphysical speculation about origins or ultimate causes	someone who emphasizes observable facts and excludes metaphysical speculation about origins or ultimate causes

positivist (adjective)	rationalist (adjective)
of or relating to positivism	of or relating to or characteristic of rationalism