Monica all these nouns are derived from the verb MENJATI, ( to change ), but their meaning could be different. So, PROMENA = act of changing. (changing a tire, change of seasons, change of direction .. ) IZMENA =exchange, (exchange of words, changing of the quard... ) SMENA = replacement, (change of the guard, to dismiss smb. MENA = change of the moon ZAMENA= replacement, to give in exchange, substitute... Sretno !

In Russian izmena -- betrayal, smena -- change, exchange; replacement, relief; shift, scheduled work period, mena -- exchange, swap. I really don't know the promena. It may be -- promenade... You may say: "It's not Serbian". But it's better than nothing.