get up vs chin up

get up and chin up both are verbs.

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

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

get up: raise from a lower to a higher position
chin up: raise oneself while hanging from one's hands until one's chin is level with the support bar

get up (verb)	chin up (verb)
get up and out of bed	raise oneself while hanging from one's hands until one's chin is level with the support bar
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