refreshment vs rejuvenation

refreshment and rejuvenation both are nouns.

Word	Noun	Adjective	Verb	Adverb
refreshment	Yes	No	No	No
rejuvenation	Yes	No	No	No

As nouns, rejuvenation is a hypernym of refreshment; that is, rejuvenation is a word with a broader meaning than refreshment:

refreshment: activity that refreshes and recreates; activity that renews your health and spirits by enjoyment and relaxation
rejuvenation: the act of restoring to a more youthful condition

refreshment (noun)	rejuvenation (noun)
activity that refreshes and recreates; activity that renews your health and spirits by enjoyment and relaxation	the act of restoring to a more youthful condition
snacks and drinks served as a light meal	the phenomenon of vitality and freshness being restored