It’s possible to download extensive controlled vocabulary keyword lists, covering just about every possible keyword you could imagine, and for Stock Photographers, those lists are ideal. Even if you decide to create your own keyword list, you might pick up some good ideas on how to structure your own list.
Here are the most popular keyword lists, in order of price.
Open Source Lightroom Keyword List Project (free to download)
Photo Keywords (paid list, also some free specialist lists)
Controlled Vocabulary (paid list, very informative website)
Ben Willmore Digital Mastery (paid list with eBook)
D65 Keyword List (paid list)
Keyword Catalog (paid list)
And there’s an excellent list of other free keyword lists and other keywording resources on the Photo Keywords website (which I have to say shows a lot of confidence in their own list!)