Derived from the COBUILD database, each book in this series provides clear and detailed explanations, supported by numerous English examples, on specific areas of English. Integrated language activity work reinforces the reference material, checking understanding and exploiting important vocabulary and usage. They are in a pocket format, and include an answer key. This book covers over 800 common words, contrasting entries dealing with meaning and usage. Grammar notes on particular points of difficulty and related words of interest are also covered.