$ jq -R -r -c -s -f textonyms.jq textonyms.txt
There are 13085 words in the Textonyms/wordlist word list that can be represented by the digit-key mapping.
They require 11932 digit combinations to represent them.
661 digit combinations represent Textonyms.
The numbers mapping to the most words map to 15 words:
27 maps to: ["AP","AQ","AR","AS","Ar","As","BP","BR","BS","Br","CP","CQ","CR","Cr","Cs"]
The longest Textonyms in the word list have length 11:
26456746242 maps to: ["Anglophobia","Anglophobic"]
24636272673 maps to: ["CinemaScope","Cinemascope"]