| ACCOSTABLE | • accostable adj. (Obsolete, rare) Approachable; affable. • ACCOSTABLE adj. approachable; affable. |
| COSTALGIAS | • COSTALGIA n. pain around the chest due to damage to a rib or nerve running below a rib. |
| COSTARRING | • costarring v. Present participle of costar. • co-starring v. Present participle of co-star. • COSTAR v. to star equally with another actor. |
| COSTEANING | • costeaning n. (Mining) A process for discovering metallic lodes by sinking small pits through the superficial deposits… • COSTEANING n. the act of sinking pits. |
| COSTLESSLY | • costlessly adv. Without cost. • COSTLESS adv. free of charge. |
| COSTLINESS | • costliness n. The characteristic of being costly. • COSTLINESS n. the state of being costly. |
| COSTMARIES | • costmaries n. Plural of costmary. • COSTMARY n. a garden plant having a strong balsamic smell, aka alecost, used as a pot herb and salad plant and in flavoring ale and beer. |
| COSTUMIERS | • costumiers n. Plural of costumier. • COSTUMIER n. one who makes or deals in costumes, as for theaters, fancy balls, etc., also COSTUMER. |
| COSTUMINGS | • costumings n. Plural of costuming. • COSTUMING n. the act of dressing. |
| SUBCOSTALS | • subcostals n. Plural of subcostal. • SUBCOSTAL n. a subcostal muscle. |
| TRICOSTATE | • tricostate adj. Having three ribs. • TRICOSTATE adj. three-ribbed; having three ribs from the base. |
| UNCOSTLIER | • UNCOSTLY adj. not costly. |
| UNICOSTATE | • unicostate adj. Having a single rib. • UNICOSTATE adj. of a leaf, having a single rib or strong nerve running upward from the base. |