Crosswords and word-games are extremely popular and this reference book is designed to be a comprehensive guide to help solve some of the more elusive clues. It combines in one volume a list of over 100,000 words by length from three to 15 letters, includes plurals and different forms of words, for example, "ing" forms of verbs. The text also contains a separate list of about 3000 unusual words of particular interest to players of word-games, and provides lists of countries with their capitals and currencies, collective nouns, counties, chemical elements and symbols.