cap off vs finish off

cap off and finish off both are verbs.

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

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

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

cap off (verb)	finish off (verb)
finish or complete, as with some decisive action	finish a task completely