liven up vs arouse

liven up and arouse both are verbs.

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

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

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

liven up (verb)	arouse (verb)
make lively	cause to be alert and energetic
	cause to become awake or conscious
	stop sleeping
	summon into action or bring into existence, often as if by magic
	call forth (emotions, feelings, and responses)
	to evoke sexual feelings
	to begin moving