So I have an idea: Tell your spellcheck that it is a real word. When I write permaculture, it comes up with a squiggly red line. I right-click on the squiggly red line and say "add to dictionary".
The theory is, most people use their spellcheck to decide what is 'real english'. So let's experiment and make permaculture real. If enough people add it to their spellcheck, maybe it could become a real word?