What is another way to spell read as one single word?

There isn't a single-word spelling of "read" that is considered standard English.

However, you could consider these options:

* "red" (though this has a completely different meaning).

* "reed" (also a different word with a different meaning).

If you're looking for a more specific way to describe reading, you could use phrases like:

* "peruse"

* "scan"

* "study"

* "devour"

The best option for you will depend on the context of your writing.