One-word substitute: “A cure for all diseases” is:

Correct answer: Panacea. A panacea is a remedy for all diseases or problems.

Background: It comes from the Greek Panakeia, the goddess of healing.

• Antidote: An antidote counteracts a particular poison.
• Elixir: An elixir is a magical potion, such as an elixir of life.
• None of these: “None of these” is incorrect because panacea is correct.

Did you know? Pan = all, akos = cure.

Memory trick: Pan (all) + akos (cure) = panacea.