replacement

(noun) the act of furnishing an equivalent person or thing in the place of another. Synonyms: replacing. Example: "Replacing the star will not be easy."

(noun) someone who takes the place of another person. Synonyms: surrogate, alternate.

(noun) an event in which one thing is substituted for another. Synonyms: substitution, permutation, transposition, switch. Example: "The replacement of lost blood by a transfusion of donor blood."

(noun) a person or thing that takes or can take the place of another. Synonyms: substitute.

(noun) filling again by supplying what has been used up. Synonyms: refilling, replenishment, renewal.

(noun) a person who follows next in order. Synonyms: successor. Example: "He was president lincoln's successor."