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.
Eckler, A. Ross
"Word Groups With Mathematical Structure,"
Word Ways: Vol. 1
, Article 8.
Available at: http://digitalcommons.butler.edu/wordways/vol1/iss4/8