undogmatic vs latitudinarian

undogmatic is not a noun while latitudinarian is a noun.

Word	Noun	Adjective	Verb	Adverb
undogmatic	No	Yes	No	No
latitudinarian	Yes	Yes	No	No

As adjectives, undogmatic and latitudinarian are synonyms defined as:

undogmatic and latitudinarian: unwilling to accept authority or dogma (especially in religion)

Other synonyms of undogmatic include free-thinking, undogmatical.

undogmatic (noun)	latitudinarian (noun)
	a person who is broad-minded and tolerant (especially in standards of religious belief and conduct)

undogmatic (adjective)	latitudinarian (adjective)
unwilling to accept authority or dogma (especially in religion)	unwilling to accept authority or dogma (especially in religion)