• cipera,
• bipera,
• gipera,
• fipera,
• vupera,
• vjpera,
• vkpera,
• vopera,
• v9pera,
• v8pera,
• fvipera,
• viperra,
• viperea,
• vpera,
• viperaa,
• wipera,
• vypera,
• vipara,
• Vypra,
• Vypura

• viverra,
• viper,
• vivier.

The adjective form of the word "vipera" is "viperal" or "viperine".

The plural form of the word "vipera" is "vipere".

The singular form of the word "vipera" is "vipera". It is the same word in both singular and plural form.