liven up vs energize

liven up and energize both are verbs.

Word	Noun	Adjective	Verb	Adverb
liven up	No	No	Yes	No
energize	No	No	Yes	No

As verbs, energize is a hypernym of liven up; that is, energize is a word with a broader meaning than liven up:

Other hypernyms of liven up include arouse, brace, energise, perk up, stimulate.

liven up (verb)	energize (verb)
make lively	cause to be alert and energetic
	raise to a higher energy level