Collocations are words that are often used together, such as utterly fascinating or concerted effort. They can be difficult to learn because they are not always predictable, and a collocate for one word does not always work as a collocate for a near synonym of that word. For example, we don't say utterly interesting, nor do we say hard effort or voice a worry. Collocation is a central feature of language and being able to produce natural word combinations is an indication of fluency. Collocatio