fill again vs replenish

fill again and replenish both are verbs.

Word	Noun	Adjective	Verb	Adverb
fill again	No	No	Yes	No
replenish	No	No	Yes	No

As verbs, fill again and replenish are synonyms defined as:

fill again and replenish: fill something that had previously been emptied

Other synonyms of fill again include refill.

fill again (verb)	replenish (verb)
fill something that had previously been emptied	fill something that had previously been emptied