Looking at words from behind and comparing similar word endings reveals new and unaccustomed aspects of the structure of words and their formation, illustrating the enormous variety of the English language. Rather than presenting a reverse list of words in endless sequence and strictly alphabetical order, this new Reverse Dictionary considers the structure and formation of words, grouping them together in sections and subdivisions. For instance, divisions include words with characteristic endings, e.g., -ug: bug, dug, fug, snug, etc. words with a certain suffix, e.g., -ate: debate, placate, abdicate, designate, etc., or -ous: tremendous, jealous, ridiculous, nervous, etc. different spelling-to-sound correspondences in word endings item compounds with the same final part, e.g., -room: from tearoom to playroom in one group, then broom, groom, mushroom, etc. vowel change in many words, e.g., branch, bench, inch, conch, lunch, haunch, lynch or dazzle, embezzle, fizzle, nozzle, puzzle. Aspects like these can only be revealed by a Reverse Dictionary of this kind. The dictionary encompasses the vocabulary considered to be in common use throughout the English-speaking world; it notes variants in spelling and pronunciation, especially those of General American English; it records all irregular forms of verbs, nouns, adjectives, and includes the main rules of regular inflection. The classification method is explained in detail in an introduction. Two appendices of grapheme-to-phoneme and phoneme-to-grapheme correspondences further extend the utility of the dictionary.