What is the Elvish script created by J.R.R. Tolkien called?

The Elvish script created by J.R.R. Tolkien is called Tengwar.

Tengwar is a writing system used for several languages in Tolkien’s legendarium, including Quenya and Sindarin. Tolkien designed it as a flexible script whose letters could represent different sounds depending on the writing mode.

In The Lord of the Rings, the Ring-inscription is written in Tengwar using the Black Speech of Mordor. That example often leads readers to assume Tengwar is itself a language, but it is a script, not a language. The language being written and the writing system are separate things.

Tolkien also created the Cirth, an angular runic writing system associated especially with the Dwarves. Sarati was an earlier script in the fictional history of Tolkien’s languages, making it another possible source of confusion.