Spooneristic switches of sounds between words can occur not just in pairs of words, but in trios, quartets, etc. of words as well. When every word in a group of n words partakes of an equivalent exchange of sounds with every other word in the group, the result can be graphically represented as an array of n words called a spoonergram.
Word Ways: Vol. 40
, Article 16.
Available at: http://digitalcommons.butler.edu/wordways/vol40/iss4/16