freethinking vs rationalism

freethinking and rationalism both are nouns.

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

As nouns, freethinking and rationalism are synonyms defined as:

freethinking and rationalism: the doctrine that reason is the right basis for regulating conduct

freethinking (noun)	rationalism (noun)
the doctrine that reason is the right basis for regulating conduct	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