disbelieving vs unbelieving

disbelieving and unbelieving both are adjectives.

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

As adjectives, disbelieving and unbelieving are synonyms defined as:

disbelieving and unbelieving: denying or questioning the tenets of especially a religion

Other synonyms of disbelieving include sceptical, skeptical.

disbelieving (adjective)	unbelieving (adjective)
denying or questioning the tenets of especially a 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