arise vs open up

arise and open up both are verbs.

Word	Noun	Adjective	Verb	Adverb
arise	No	No	Yes	No
open up	No	No	Yes	No

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

Other hyponyms of arise include condense, open, come up.

arise (verb)	open up (verb)
get up and out of bed	make available
result or issue	become available
rise to one's feet	talk freely and without inhibition
move upward	cause to open or to become open
take part in a rebellion; renounce a former allegiance	become open
come into existence; take on form or shape	open up an area or prepare a way
originate or come into being	start to operate or function or cause to start operating or functioning