is a specific kind of: ophidian, serpent, snake.

is a broader term that covers: hoop snake | Carphophis amoenus, thunder snake, worm snake | ring-necked snake, ring snake, ringneck snake | hognose snake, puff adder, sand viper | leaf-nosed snake | grass snake, green snake | green snake | racer | whip-snake, whip snake, whipsnake | rat snake | Arizona elegans, glossy snake | bull-snake, bull snake | king snake, kingsnake | garter snake, grass snake | lined snake, Tropidoclonion lineatum | ground snake, Sonora semiannulata | eastern ground snake, Haldea striatula, Potamophis striatula | water snake | red-bellied snake, Storeria occipitamaculata | sand snake | black-headed snake | vine snake | lyre snake | Hypsiglena torquata, night snake | Drymarchon corais, gopher snake, indigo snake ... show more.

is a member of: Colubridae, family Colubridae.