get down vs go down

get down and go down both are verbs.

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

As verbs, go down is a hypernym of get down; that is, go down is a word with a broader meaning than get down:

Other hypernyms of get down include come down, descend, fall.

get down (verb)	go down (verb)
take the first step or steps in carrying out an action	grow smaller
put down in writing; of texts, musical compositions, etc.	stop operating
pass through the esophagus as part of eating or drinking	be defeated
lower someone's spirits; make downhearted	be ingested
move something or somebody to a lower position	go under
alight from (a horse)	disappear beyond the horizon
lower (one's body) as by kneeling	move downward and lower, but not necessarily all the way
	be recorded or remembered