hold on vs hold over

hold on and hold over both are verbs.

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

As verbs, hold over is a hyponym of hold on; that is, hold over is a word with a more specific, narrower meaning than hold on:

hold on (verb)	hold over (verb)
be persistent, refuse to stop	intimidate somebody (with a threat)
stop and wait, as if awaiting further instructions or developments	hold over goods to be sold for the next season
hold the phone line open	keep in a position or state from an earlier period of time
hold firmly	continue a term of office past the normal period of time
retain possession of	hold back to a later time