In a companion article, Hugo Brandt Corstius exhibits a set of Dutch words consisting of a tautonyms to which have been added an additional letter of the alphabet in the beginning, in the middle, or at the end. This article exhibits corresponding English words drawn from Webster's Second or Third (except when noted). When the extra letter is the middle, these words were christened by John Ferguson as Heads 'n' Tails Words, and a type collection was presented by Murray Pearce in the August 1971 Word Ways (with some better examples in February 1972).
Eckler, A. Ross
"Enlarging English Tautonyms,"
Word Ways: Vol. 39
, Article 21.
Available at: https://digitalcommons.butler.edu/wordways/vol39/iss1/21