Stored-up refers to something that has been accumulated or saved for future use or reference. There are several other words that can be used to describe this concept, including hoarded, stockpiled, collected, amassed, accumulated, and saved. Hoarded implies that the items have been gathered obsessively or compulsively, whereas stockpiled suggests a deliberate effort to gather a supply of something. Collected can refer to items that have been gathered with care or purpose, while amassed implies a great quantity of something. Similarly, accumulated suggests a gradual buildup over time, while saved implies a conscious effort to set something aside for later use. Overall, there are many synonyms for stored-up that can be used to convey different shades of meaning and nuance.