descending vs downward

descending and downward both are adjectives.

Word	Noun	Adjective	Verb	Adverb
descending	No	Yes	No	No
downward	No	Yes	No	Yes

descending (adjective)	downward (adjective)
coming down or downward	extending or moving from a higher to a lower place
	on or toward a surface regarded as a base

descending (adverb)	downward (adverb)
	spatially or metaphorically from a higher to a lower level or position