Calcitic is an adjective that refers to a type of rock or mineral that contains calcium carbonate. There are several synonyms that can be used to describe calcitic, including limestone, chalky, carbonate, and calcareous. Limestone is a common synonym for calcitic since it is a sedimentary rock composed primarily of calcium carbonate. Chalky is another word that can be used interchangeably with calcitic as it refers to a substance or item that contains calcite. Carbonate is a more general term for any compound that contains the carbonate ion, including calcium carbonate, while calcareous refers to any material containing calcium carbonate or similar minerals.