The phrase "stacks with" is often used in reference to discounts or promotions that can be combined with other offers. Synonyms for this phrase include "combines with," "works in tandem with," "goes hand in hand with," or "pairs with." Other similar phrases that convey the same meaning include "adds to," "enhances," "complements," "boosts," or "amplifies." These synonyms provide alternative ways of expressing the same concept of something that can be utilized in conjunction with another item or option. Whether in commerce, technology, or entertainment, "stacking with" synonyms are an important aspect of maximizing value and functionality.