Platinum and Tie pin

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.

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

Platinum and tie pin are semantically related. Sometimes you can use "Platinum" instead a noun phrase "Tie pin".