Word Groups With Mathematical Structure

Logophiles have extensively studied interesting properties of isolated words: palindromes, anagrams and antigrams, multiple transposals, words with successive doubled letters, and so forth. Somewhat less effort has been expended upon an equally interesting and potentially far richer field: the construction of groups of words which conform to certain rules. Perhaps the best-known examples of these are word ladders (less, loss, lose, lore, more) and word squares