Writing Aid is a new dictionary and reference app for iPhone that's a little more flexible than your average dictionary. Aside from normal dictionary behavior, Writing Aid can also help you figure out words based on key words.
Most of us have had a time where we knew what word we wanted to use but drew a blank. We could describe what it means, but not think of the exact word. This is where Writing Aid comes in handy. Just type in a few descriptive key words that explain what word you're trying to think of and let Writing Aid do the rest. For example, typing in blue green populates words like teal, cyan, and more.
For anyone who needs a pocket dictionary that can help you fill in the blanks, I'd suggest trying out Writing Aid. If you happen to pick it up, let me know what you think. Does it find what you're looking for with little effort or does it still need some work?