This API provides a level-appropriate word association quiz for game and e-learning software. Using this API you can provide vocabulary tests where each questions shows a group of three related words with two other words which one of is related to the group. For example, when a group with words like "bar", "alcohol", "drink"is given with two possible choices "beer" and "cat" is shown, the test taker would have to select the choice that is closer related to the group. Word associations is very effective to vocabulary learning because it helps people to understand words quickly and memorize them effectively.