Our current base list is the intersection of Wordnik's games wordlist and the SCOWL spellchecker — words in both are a definite yes, and SCOWL's capitalization helps us filter out acronyms and proper nouns.

We have done some manual massaging beyond that, but not much. Waiting for more feedback like this! You can see the current tranches of dictionary massaging here: https://github.com/TruncateGame/Truncate/tree/main/dict_buil...