RESERVOIR n.
A place where anything is kept in store; especially, a place where water is collected and kept for use when wanted, as to supply a fountain, a canal, or a city by means of aqueducts, or to drive a mill wheel, or the like.
RESTORATION n. 3 definitions
restoring or bringing back to a former place, station, or condition; the fact of being restored; renewal; reëstablishment; as, the restoration of friendship between enemies; the restoration of peace after war. Behold the different climes agree, Rejoicing in thy restoration. Dryden.