descend vs get down

descend and get down both are verbs.

Word	Noun	Adjective	Verb	Adverb
descend	No	No	Yes	No
get down	No	No	Yes	No

As verbs, get down is a hyponym of descend; that is, get down is a word with a more specific, narrower meaning than descend:

descend (verb)	get down (verb)
come as if by falling	take the first step or steps in carrying out an action
move downward and lower, but not necessarily all the way	put down in writing; of texts, musical compositions, etc.
do something that one considers to be below one's dignity	pass through the esophagus as part of eating or drinking
come from; be connected by a relationship of blood, for example	lower someone's spirits; make downhearted
	move something or somebody to a lower position
	alight from (a horse)
	lower (one's body) as by kneeling