[jhgb]

I wonder where "correct horse battery staple" would be located...

[SamBam]

Looking at the 3 word-based W3W, for some reason they have "horses" and not "horse," but you can find both https://what3words.com/correct.horses.battery and https://what3words.com/horses.battery.staple, and interestingly enough they are both in Canada, one in Nunavut and the other in Quebec.

[jhgb]

"...if the solution is to use words, then What4Words would have had a word list of less than 3000, resulting in a word list with less confusable words..."

[SamBam]

I had ninja-edited to be clearer, but perhaps I was too slow. I was simply noting what the equivalent two locations would be in W3W.