get up vs get dressed

get up and get dressed both are verbs.

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

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

get up: put on special clothes to appear particularly appealing and attractive
get dressed: put on clothes

Other hypernyms of get up include dress.

get up (verb)	get dressed (verb)
get up and out of bed	put on clothes
cause to rise
put on special clothes to appear particularly appealing and attractive
develop
study intensively, as before an exam
arrange by systematic planning and united effort
raise from a lower to a higher position
rise to one's feet