viper
Adder or viper.
Adder (snake) Alligator Ant bear (anteater) Anteater
Rattlesnake, rat snake and royal python are snakes. They begin with the letter r.
a snake because it has venom
and that was the end of mousy
the tortuga snake
Some six letter words ending in R are:antleranswerbeaverbetterbitterborderbutlerbuttercratercursorcuterfalterfiltergarterhamperhatterhealerheaterhotterjuniorkinderladderlardermurderporterpotter
It is never ending. So if you end with your snake like this < or > or you hit the wall it ends
Gibraltar ends with an r.
Adders
Anaconda.