Oniomania is a noun that refers to an uncontrollable urge to buy things.

The Greek word onos (OH nose) means ‘price’ and the Greek suffix M-A-N-I-A is used to indicate a mental abnormality or obsession. Here’s an example of our word of the day in use:

One of the biggest stresses a marriage can endure is oniomania. In addition to the stress it causes, it can also send both spouses into severe poverty.