TRAILS-TRIALS and MANTEL-MENTAL ARE EXAMPLES OF 6-LETTER VOWEL SWAP TRANSPOSALS (VSTs), the 2 vowels swapping places and the 4 consonants remaining in situ. Here, I search for 6-letter VSTs having 2, 3, 4, 5 and 6 vowels respectively, all the vowels changing places with other vowels. Previous items on letter swap transposals (WW91038, 91089, 91252) deal solely with swapping 2 letters according to their positions in a word: e.g. 3-6 CANTOR-CARTON and 5-6 ALBION-ALBINO, irrespective of whether the 2 letters are consonants, vowels or one of each.
"Vowel Swap Transposals,"
Word Ways: Vol. 38
, Article 6.
Available at: http://digitalcommons.butler.edu/wordways/vol38/iss2/6