carry over vs hold on

carry over and hold on both are verbs.

Word	Noun	Adjective	Verb	Adverb
carry over	No	No	Yes	No
hold on	No	No	Yes	No

As verbs, hold on is a hypernym of carry over; that is, hold on is a word with a broader meaning than carry over:

Other hypernyms of carry over include keep.

carry over (verb)	hold on (verb)
transfer or persist from one stage or sphere of activity to another	be persistent, refuse to stop
transfer from one time period to the next	stop and wait, as if awaiting further instructions or developments
transport from one place or state to another	hold the phone line open
hold over goods to be sold for the next season	hold firmly
	retain possession of