"Alps on Alps" refers to an excessive or overwhelming amount of something. There are several synonyms that can be used to convey a similar meaning to "Alps on Alps." "Mountains of," "heaps of," and "piles of" are some apt substitutes for it. Other terms such as "countless," "innumerable," and "infinite" also work well. It can also be referred to as "overabundance," "superfluity," or "glut." The phrase can be used in a variety of contexts, from expressing frustration over workloads to describing the amount of responsibilities, tasks, or problems that need to be tackled. Employing appropriate synonyms helps to convey the intended message more effectively and efficiently.