This story began over a year ago on page 106 of the May 2014 issue of Word Ways when Anil challenged me to find what he called NAUTONYMS, "sounded but not spelled tautonyms like RETREAT".
"The Nautonym Story,"
Word Ways: Vol. 48
, Article 6.
Available at: http://digitalcommons.butler.edu/wordways/vol48/iss3/6