[n] the act of rescinding; (law) the cancellation of a contract and the return of the parties to the positions they would have had if the contract had not been made; recission may be brought about by decree or by mutual consent
RESCISSION is a 10 letter word that starts with R.
\Re*scis"sion\ (r?-s?zh"?n), n. [L. rescissio: cf. F.
rescission. See {Rescind}.]
The act of rescinding, abrogating, annulling, or vacating;
as, the rescission of a law, decree, or judgment.
WordNet Dictionary