viper

Rattlesnakes belong to the viper family.

viper's bugloss (=blue weed)

He unwarily treads upon a viper asleep just before his feet.

Any of several venomous snakes of the genus Cerastes, such as the horned viper, having hornlike projections over each eye.

The viper slithered silently through the grass.

Fear gripped her heart as she spotted the viper coiled up on the path.

The viper's venom can be deadly.

He handled the viper with caution, knowing its dangerous nature.

A viper's bite can cause severe pain and swelling.

The viper's tongue flicked in and out, sensing its surroundings.

The viper's scales gleamed in the sunlight.

She carefully observed the viper from a safe distance.

The viper's eyes were fixed on its prey, ready to strike.

The viper's hiss sent shivers down her spine.