equivalent

(noun) a person or thing equal to another in value or measure or force or effect or significance etc. Example: "Send two dollars or the equivalent in stamps."

(noun) the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen. Synonyms: equivalent weight, combining weight, eq.

(adj) being essentially equal to something. Synonyms: tantamount(predicate). Examples: "It was as good as gold." "A wish that was equivalent to a command." "His statement was tantamount to an admission of guilt."