VOWEL (SHIFT) CASCADES (02-53,192) are sentential or meaningful WORD LADDERS that run thru the vowels in one spot, eg, Bad bed bid bod bud. (Bedbugs, VD or pregnancy?) Vowel cascades can also be PHONIC: Bait beat: "Bite!" bought boot (The Shoe of the Fisherman). Susan Thorpe (11-155) calls meaningless examples of PHONETIC VOWEL ROTATIONS, although rotator has a prior wordplay meaning as a non-mirror word inversion like up/dn (see up/dn). She gives many good non-sentential examples with long vowel sounds but ignores short vowels.
"Iambic Double Vowel Shift Cascades,"
Word Ways: Vol. 44
, Article 11.
Available at: http://digitalcommons.butler.edu/wordways/vol44/iss3/11