After reading the article by Darryl Francis on numerical tautonyms in the February 1970 Word Ways, I became interested in the possibility of building one or more word squares consisting of two-part six-letter tautonyms. Since this could not be done with the 45 words listed in his article, I began a systematic search for more, and the list given below is the result.
Card, Leslie E.
"Six-Letter Numerical Tautonyms,"
Word Ways: Vol. 3
, Article 15.
Available at: http://digitalcommons.butler.edu/wordways/vol3/iss4/15