I have to say congrats for coming up with this mechanic, it's really original and makes for an interesting game.
The only problem with the mechanic is that it seems that when you enter a word, every object that is associated with it disappears... For example I made the house in the top right corner disappear and then at the opposite side of the map I came across an invisible house which I managed to enter because the space bar icon popped up.
I also encountered an NPC who spoke Spanish, not sure if it was intentional.
Other than that I had fun playing your game :)