Bulk-buy is a term used when purchasing goods in large quantities, usually at a reduced price. While this is a commonly used term, there are several synonyms that can be used to convey the same meaning. Some of these include "volume purchase," "wholesale buy," "mass purchase," "quantity purchase," and "large order." These words can be used interchangeably to describe the act of buying in bulk. In addition, the term "bulk purchase" can also be used to convey the same meaning. Regardless of the word used, the act of bulk buying is a great way to save money and ensure that you always have enough of a product on hand.