When we talk about something that lasts long, we refer to its durability or longevity. In other words, it is able to withstand the test of time. Some synonyms for "last long" include "endure," "persist," "withstand," "survive," and "prolong." These words indicate that something can maintain its quality, strength, or usefulness over an extended period of time. Other synonyms include "perennial," "everlasting," "timeless," "indestructible," and "unfading." Whether we're talking about a relationship, a product, or a memory, we all want things that last long and stand the test of time.