reverse spelling

noun2

1. •
   The spelling or writing of a word in reverse or from back to front.

   • Teaching assistants monitored accuracy of reverse spelling. Later in the session, students were asked to spell words in writing from each of the word sets practiced in the session. — 2006
2. •
   A specific spelling of a word representing a phonetic feature never present in it, but present in other words in the same phonetic environment (and later lost); an inverse spelling.

   • Beside ninety-odd correct ea spellings, Belfour IX has twelve plainly monophthongized and one reverse spelling, with a penumbra of phonetically special cases. — 1992