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Empirically, no. What's yours? The fragility is a problem too. TS7 0 will get close to me even if I mix up the last 2 letters, and the postie will spot the street anomaly. Misremember a w3w word and you're on the other side of the world
Placing similar words far apart is a design feature that allows errors to be spotted and corrected easily. You can read more here:https://support.what3words.com/en/articles/2212828-what-if-i-spell-or-say-a-word-incorrectly-or-get-the-words-in-the-wrong-order …
A short thread about UK postcodes
