irreligious vs unbelieving

irreligious and unbelieving both are adjectives.

Word	Noun	Adjective	Verb	Adverb
irreligious	No	Yes	No	No
unbelieving	No	Yes	No	No

irreligious (adjective)	unbelieving (adjective)
hostile or indifferent to religion	holding that only material phenomena can be known and knowledge of spiritual matters or ultimate causes is impossible
	denying or questioning the tenets of especially a religion
	rejecting any belief in gods