arouse vs liven up

arouse and liven up both are verbs.

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

As verbs, liven up is a hyponym of arouse; that is, liven up is a word with a more specific, narrower meaning than arouse:

arouse (verb)	liven up (verb)
cause to be alert and energetic	make lively
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