Backburner, Back Burner or Back-Burner?

Question

When in the context of

Putting something on the *.

which is correct? Backburner, Back Burner or Back-Burner? Are there international differences here, or are some of them really just wrong?

Answer 1

I'm pretty sure you can use any of those three.

Cambridge Dictionary uses 'on the back burner'

Whereas Google define lists the other two options

On the second link you can also see some of the variations other online dictionaries use.

So, I'd say it's probably just a matter of preference.