Comment by arthurfm

Using 'Free' could also be a nod to the fact that there are a lot of very similar sounding words in the What3Words system [1].

The What3Words word list is 40,000 words long. It is important that words in this list cannot be confused, otherwise they may be communicated incorrectly. For example band/banned, bare/bear, beat/beet are easily confused.

A quick inspection of their word list finds the following words that sound very, very similar to one another:

  equivalence   equivalents
  incidence     incidents
  incite        insight
  incompetence  incompetents
  independence  independents
  innocence     innocents
  instance      instants
  intense       intents
  lightening    lightning
  ordinance     ordnance

[1] https://cybergibbons.com/security-2/why-what3words-is-not-su...