liven up vs stimulate

liven up and stimulate both are verbs.

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

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

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

liven up (verb)	stimulate (verb)
make lively	cause to be alert and energetic
	act as a stimulant
	provide the needed stimulus for
	cause to do; cause to act in a specified manner
	cause to occur rapidly
	stir the feelings, emotions, or peace of
	stir feelings in