wrap up vs cap off

wrap up and cap off both are verbs.

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

As verbs, cap off is a hyponym of wrap up; that is, cap off is a word with a more specific, narrower meaning than wrap up:

wrap up (verb)	cap off (verb)
clothe, as if for protection from the elements	finish or complete, as with some decisive action
form a cylinder by rolling
finish a task completely
arrange or fold as a cover or protection