Just playing around with this data set, I can't understand why What3Words is so exciting. The dataset includes words with plural versions, different tenses of the same word, and words that are combinations of shorter words that are also in the data set.

If I'm listening to an emergency responder at ship.wreck.shipwreck, or was that at shipwreck.ship.wreck

There are probably a lot of ways to accidentally get confusion with such poorly groomed word combinations. Maybe they've come up with a clever way to make such combinations exist in the middle of the ocean, which would be a great place for a shipwreck.ship.wreck anyways :)