grammatical case,
case a portable container for carrying several objects; "the musicians left their instrument cases backstage"
Adjective
nominative -
serving as or indicating the subject of a verb and words identified with the subject of a copular verb; "nominative noun endings"; "predicate nominative"
grammar the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)
nominative -
named; bearing the name of a specific person; "nominative shares of stock"