come on vs get down

come on and get down both are verbs.

Word	Noun	Adjective	Verb	Adverb
come on	No	No	Yes	No
get down	No	No	Yes	No

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

Other hypernyms of come on include begin, commence, get, set about, set out, start, start out.

come on (verb)	get down (verb)
occur or become available	take the first step or steps in carrying out an action
appear or become visible; make a showing	put down in writing; of texts, musical compositions, etc.
develop in a positive way	pass through the esophagus as part of eating or drinking
start running, functioning, or operating	lower someone's spirits; make downhearted
move towards	move something or somebody to a lower position
	alight from (a horse)
	lower (one's body) as by kneeling