The 3-letter poisonous snake is almost always "asp."
THE HOGNOSE SNAKE'S NAME STARTS WITH THE LETTER H.
Asps (plural) http://en.wikipedia.org/wiki/Asp_(reptile)
Consider the Adder, commonly called the: Death Adder(Acanthophis antarcticus) or the Australian Brown Snake (Pseudonaja textilis).
black rat snake
a snake
The aptly named 'Brown Snake' from Australia is a venomous brown snake.
Consider the Adder, commonly called the: Death Adder(Acanthophis antarcticus) or the Australian Brown Snake (Pseudonaja textilis), Asp Viper,(Vipera aspis zinnikeri).
corbra
Pine woods snake, Plain Bellied water snake, plains garter snake and Pygmy Rattlesnakes
snake, ivy and mushrooms
asp
If the snake is poisonous then it is probably a good name. I would recommend the name Jeff lol but that's not very good.