rationalist vs rationalism

rationalist and rationalism both are nouns.

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

rationalist (noun)	rationalism (noun)
someone who emphasizes observable facts and excludes metaphysical speculation about origins or ultimate causes	the doctrine that reason is the right basis for regulating conduct
	(philosophy) the doctrine that knowledge is acquired by reason without resort to experience
	the theological doctrine that human reason rather than divine revelation establishes religious truth

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