Word: 
Words and phrases whose definition contains viper:  (19 results)
5 letters:
adder
6 letters:
horned
7 letters:
rattler
8 letters:
cerastes
10 letters:
copperhead, horned asp, puff adder, sand viper
11 letters:
rattlesnake
12 letters:
common viper, fer-de-lance, gaboon viper, horned viper, vipera berus
14 letters:
bitis arietans, bitis gabonica
15 letters:
bothrops atrops
17 letters:
cerastes cornutus
22 letters:
agkistrodon contortrix
Commonly used words are shown in bold. Rare words are dimmed.
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