Seesaw word ladders are ladders that alternate or seesaw between lists of transpositions (anagrams) of just two words (or alphomes) that differ by a single letter.
Anil, . and Eckler, Ross
"Seesaw Word Ladders,"
Word Ways: Vol. 48
, Article 8.
Available at: http://digitalcommons.butler.edu/wordways/vol48/iss2/8