がらがら蛇[garagarahebi] rattlesnake
烏蛇[karasuhebi] black snake
錦蛇[nishikihebi] python
黒蛇[kurohebi] blacksnake
縞蛇[shimahebi] pale-yellow snake (non-poisonous)

蛇の目[janome] (umbrella with) bull's-eye (pattern)
蛇口[jaguchi] faucet
蛇行[dakou] meandering
蛇足[dasoku] redundancy

頷いて[unazuite] with a nod
頷く[unazuku] to nod
黄頷蛇[aodaishou] Japanese rat snake (Elaphe climacophora)

頷き[unazuki] nod
頷きあう[unazukiau] to nod to one another