"It turns out almost any word or word pair that is not an obviously bad name is a sufficiently good one, and the number of such domains is so large that you can find plenty that are cheap or even untaken." So, after reading this advice, I decided I'd actually try it out - it's easy enough to download a word list and write a script that pings a WHOIS API to check every single word or word pair. Turns out most such API…
There are still a few one-word domains left in the .com TLD (e.g. naziisms.com, regularizing.com, castigators.com). I myself registered one earlier this summer. http://www.randomdotcom.com/
"Certainly there are some unfortunate connotations with our name, but we feel that the advantage of having a memorable, one-word dot-com domain name is worth it." - Bob Q. Startup, Founder and CEO of Naziisms, Inc.