Greg Pierce at Agile Tortoise has now released a free OS X dictionary based on WordNet, which effectively brings Terminology to your Mac.
dictionary
How can I set up a dictionary of placenames, which I can then access throughout my applications?
This is a book to dip into only if you have good self-control: one word will lead to another, until you have visited each of the 500 or so.
Macs have always provided good tools to support writing in different languages, and Yosemite has continued to advance them. But how can you tailor and extend them?
We who forge words into documents lack anything as powerful as Illustrator or Photoshop are to graphics.
The Eclectic Light Company 