rejuvenation vs greening

rejuvenation and greening both are nouns.

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

As nouns, rejuvenation and greening are synonyms defined as:

rejuvenation and greening: the phenomenon of vitality and freshness being restored

rejuvenation (noun)	greening (noun)
the act of restoring to a more youthful condition	the phenomenon of vitality and freshness being restored
the phenomenon of vitality and freshness being restored