Not sure when this feature was introduced but if you search for images on Yahoo, it also offers some brilliant and useful suggestions related to your query.
For instance, when I searched for images of domino’s pizza on Yahoo, the suggestions included McDonald’s, Pizza Hut, Burger King, KFC and Subway - all fast food chains. However, the suggestions for the word "pizza" were about ice creams, cakes and only food items.
And here are some more examples for "India" and "Barack Obama". It’s useful because you get to see related places, personalities, objects, etc. right in the same search query.
