Heterodon spp. (hog-nosed snakes), a genus of harmless colubrid snakes found in North America
A small venomous serpent of the genus Vipera
Agkistrodon contortrix mokasen, the northern copperhead, a venomous viper found in the eastern United States
Lampropeltis triangulum (milk snake).
The puff adders, of Africa (genus Bitis).
The common European adder (Vipera berus).
Someone who or something which performs arithmetic addition; a machine for adding numbers.
Acanthophis spp. (death adders), elapid snakes found in Southeast Asia and Australia
A sea stickleback or adder fish (Spinachia spinachia).
An electronic device that adds voltages, currents or frequencies.
Something which adds or increases.
Synonym of plumber's snake