The November 1973 issue of Word Ways included an interesting article about the wordplay of James Thurber. The article cited an observation made by Thurber that a startling affinity or antipathy exists between the letters C and M, when those letters occur as the first letters of words or names. Examples mentioned in the article included CAT and MOUSE, MALICE and CHARITY, and CHAMBERLAIN and MUNICH.
Xixx, Jezebel Q.
Word Ways: Vol. 15
, Article 19.
Available at: https://digitalcommons.butler.edu/wordways/vol15/iss2/19