mundane vs secular

mundane is not a noun while secular is a noun.

Word	Noun	Adjective	Verb	Adverb
mundane	No	Yes	No	No
secular	Yes	Yes	No	No

mundane (noun)	secular (noun)
	someone who is not a clergyman or a professional person

mundane (adjective)	secular (adjective)
belonging to this earth or world; not ideal or heavenly	of or relating to clergy not bound by monastic vows
found in the ordinary course of events	not concerned with or devoted to religion
concerned with the world or worldly matters	characteristic of or devoted to the temporal world as opposed to the spiritual world
	of or relating to the doctrine that rejects religion and religious considerations
	characteristic of those who are not members of the clergy