Dutch has less spaces. Generally if it's one object, it's one word. This causes a typical spelling mistake native Dutch speakers make in English: we combine words into one that should be two words.

In Dutch "eier dop" does not exist. Could be "ei dop" and then you're taking about two separate objects, an egg and a cap (as in bottle cap).

And that's also immediately an example, I tried to type that as bottlecap and my phone corrected it with an extra space ;-)