Platinum and Pennies

Platinum noun - A heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits.

Pennies and platinum are semantically related. In some cases you can use "Pennies" instead a noun "Platinum".

Platinum and pennies are semantically related. Sometimes you can use "Platinum" instead a noun "Pennies".