Merhaba,

could you explain to me the difference between two expressions:

bir yığın para and para yığını

The latter is clear to me- a stack of money

But is the first one gramatically correct at all?

it seems just like two separate nouns: a stack money-

No possessive marker although the word yığın does not describe the material or substance money is made of, does it?

yığın is like a measure word here, just like kilo in

                                  bir kilo muz.

I would say yığın is the head of that nominal phrase and para is defining it but I don´t know really how Turks analyse it. If a grammatical ending was needed where would it be placed, in yığın or para?