Funny that in Dutch probably (at least) some of these words do exist, I mean stuff like "week broodje" (mushy little bread) and "weekbroodje" (bread of the week) have a very different meaning based on the use of a space or not. In fact, we have a nice website that focusses on the incorrect use of spaces: SOS (Signalering Onjuist Spatiegebruik) [0], notice that spatiegebruik is 1 word ("Space-use")!
[0] https://www.spatiegebruik.nl/