I don't remember where I originally got the spreadsheet, but I have a spreadsheet that is setup for necromancer research.
You fill in how many of what words you have and you can tell pretty much at a glance what spells you can make.
I have uploaded it to google docs, and it seems to work there.
https://docs.google.com/spreadsheet/...W5qVUQ0R29Gdnc
Should allow you to download it and then re-upload it to google docs or edit it in libre/openoffice or excel.