cap off vs finish up

cap off and finish up both are verbs.

Word	Noun	Adjective	Verb	Adverb
cap off	No	No	Yes	No
finish up	No	No	Yes	No

As verbs, finish up is a hypernym of cap off; that is, finish up is a word with a broader meaning than cap off:

Other hypernyms of cap off include clear up, finish off, get through, mop up, polish off, wrap up.

cap off (verb)	finish up (verb)
finish or complete, as with some decisive action	finish a task completely
	finally be or do something