invigorate vs pep up

invigorate and pep up both are verbs.

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

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

Other hyponyms of invigorate include ginger up, jazz up, juice up, inspirit, spirit, spirit up.

invigorate (verb)	pep up (verb)
impart vigor, strength, or vitality to	make more interesting or lively
make lively	spur on or encourage especially by cheers and shouts
give life or energy to
heighten or intensify