“Run that, and you’ll have a list of 93,000 dictionary words that are available with the .com extension.”
ICANN will hand you the entire .com zone file for free. That is 404 million lines and 162 million unique names. Load it into SQLite and you can check every dictionary word without typing ideas into a registrar’s search box. The “every good name is taken” line is a sales pitch for the domain resale market.