The phrase "sandwichwise" can be replaced with various synonyms according to the context in which it is used. One of the most commonly used alternatives for "sandwichwise" is "bread-and-butter-wise," which indicates the basic foundation of something. Similarly, "filling-wise" can be used to refer to the content or components within, while "layer-wise" signifies something that is arranged in levels or strata. Other variations that could be used include "stack-wise," "hoagie-wise," or "contents-wise," all of which directly or indirectly refer to the sandwich format. As such, the choice of the appropriate synonym for "sandwichwise" ultimately depends on the intended meaning and purpose of the sentence in which it is used.