` Not in standard English. term=carpark '.
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Well, yes it can - a simple Google search shows a 7:1 ratio for car park : carpark. And Collins gives the single word version as an alternative. That suggests that the move to a single word is underway (ha! I still prefer 'under way') and it really comes down to your confidence in being part of the vanguard, risking accusations of being 'wrong'.
tamguatlayCan car park be spelled as carpark (one word)?
The short answer is 'yes'. The majority of examples of it on fraze.it are from New Zealand. However, the majority of examples of "car park" are from the United Kingdom.
In short, where you live determines to some extent which version will be found acceptable.
CJ