>>>>What's proper plural of Windows, falls, crossroads, savings?
>>>
>>>headaches, pain, traffic jam[s] (depending on how close together they are), getting swindled
>>
>>Maybe I wasn't clear. I didn't ask for a translation. I asked for the plural form of these nouns.
>
>Won't speak to the others, but crossroads is already plural.

Crossroadses can't cross each other, they aren't roads, they are places where roads meet. You only get one more complicated crossroads.

>When one crossroad intersects another, we have crossroads.
>Saying "a crossroads" might be common, but lots of common things are incorrect.

True, and I was asking for this common case, how does one put them into plural - is "to get there you need to go straight on first four crossroadses and take a right on the fifth", or...?