come up vs ascend

come up and ascend both are verbs.

Word	Noun	Adjective	Verb	Adverb
come up	No	No	Yes	No
ascend	No	No	Yes	No

As verbs, come up and ascend are synonyms defined as:

Other synonyms of come up include rise, uprise.

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

Other hypernyms of come up include go up.

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

come up (verb)	ascend (verb)
result or issue	slope upwards
start running, functioning, or operating	travel up
gather or bring together	come up, of celestial bodies
gather (money or other resources) together over time	go along towards (a river's) source
bring forth, usually something desirable	move to a better position in life or to a better job
come up, of celestial bodies	appear to be moving upward, as by means of tendrils
come to the surface	become king or queen
move toward, travel toward something or somebody or approach something or somebody	go back in order of genealogical succession
move upward
get something or somebody for a specific purpose
originate or come into being
be mentioned