Wiktionary
dreamable
a. That can be dreamed, or dreamed of.
Usage examples of "dreamable".
There are horrors beyond horrors, and this was one of those nuclei of all dreamable hideousness which the cosmos saves to blast an accursed and unhappy few.
Curly had the inside track there, and I knew it, but that couldn't keep a body from dreaming, and dreamable girls were almighty scarce in this country.