A previous article ("Importunate Permutation: Aphroistical Parochialist" in the August 2003 Word Ways) explored the often entertaining results when transposals are set adjacently. Looking at transposal sets also reveals pairs (and sometimes trios) of words which are to a varying degree synonymous, related or antonymous. I have coined the term 'synonagrams' for the former and retained the current 'antigrams' for the latter, in a selection below.
Word Ways: Vol. 36
, Article 15.
Available at: https://digitalcommons.butler.edu/wordways/vol36/iss4/15