renewal vs replenishment

renewal and replenishment both are nouns.

Word	Noun	Adjective	Verb	Adverb
renewal	Yes	No	No	No
replenishment	Yes	No	No	No

As nouns, renewal and replenishment are synonyms defined as:

renewal and replenishment: filling again by supplying what has been used up

Other synonyms of renewal include refilling, replacement.

renewal (noun)	replenishment (noun)
the conversion of wasteland into land suitable for use of habitation or cultivation	filling again by supplying what has been used up
the act of renewing
filling again by supplying what has been used up