I think it depends of the word. I mean great words like sex.net have gone for lots but others such as antimony...not so much. Go to name bio and do a search of previous sales.
English language is diverse and often obfuscated. You can run a generic English dictionary list and come up with 20,000 availables, however NONE are worth reg. fee.
My master list is updated every day with 15,000+ new domain names, and from that the $5 Dictionary word list is created. So if you don't see any you like check back tomorrow.