ask for it vs hold on

ask for it and hold on both are verbs.

Word	Noun	Adjective	Verb	Adverb
ask for it	No	No	Yes	No
hold on	No	No	Yes	No

As verbs, hold on is a hypernym of ask for it; that is, hold on is a word with a broader meaning than ask for it:

ask for it: persist with actions or an attitude despite the probability that it will cause trouble
hold on: be persistent, refuse to stop

Other hypernyms of ask for it include hang in, hang on, persevere, persist.

ask for it (verb)	hold on (verb)
persist with actions or an attitude despite the probability that it will cause trouble	be persistent, refuse to stop
	stop and wait, as if awaiting further instructions or developments
	hold the phone line open
	hold firmly
	retain possession of