get up vs pick up

get up and pick up both are verbs.

Word	Noun	Adjective	Verb	Adverb
get up	No	No	Yes	No
pick up	No	No	Yes	No

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

get up (verb)	pick up (verb)
get up and out of bed	gain or regain energy
cause to rise	improve significantly; go from bad to good
put on special clothes to appear particularly appealing and attractive	lift out or reflect from a background
develop	get to know or become aware of, usually accidentally
study intensively, as before an exam	eat by pecking at, like a bird
arrange by systematic planning and united effort	take into custody
raise from a lower to a higher position	take up by hand
rise to one's feet	fill with high spirits; fill with optimism
	give a passenger or a hitchhiker a lift
	take and lift upward
	perceive with the senses quickly, suddenly, or momentarily
	register (perceptual input)
	buy casually or spontaneously
	gather or collect
	get in addition, as an increase
	meet someone for sexual purposes