The phrase "consume away" refers to the gradual destruction or erosion caused by constant use or exposure. Synonyms for this phrase include words like erode, corrode, wear, eat, gnaw, and deteriorate. These words all imply a slow, steady process that gradually wears away a surface or substance. Other synonyms for "consume away" might include phrases like "wear down," "eat away at," or "gradually destroy." Whether you're talking about a physical object, like a piece of metal or a building, or a more abstract concept, like time or resources, these synonyms can help you communicate the idea of gradual consumption or erosion.