liven up vs invigorate

liven up and invigorate both are verbs.

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

As verbs, liven up and invigorate are synonyms defined as:

Other synonyms of liven up include animate, enliven, liven.

liven up (verb)	invigorate (verb)
make lively	impart vigor, strength, or vitality to
	make lively
	give life or energy to
	heighten or intensify