"More wafer-thin" implies something that is incredibly thin and delicate. The antonyms for this phrase can indicate something that is larger, thicker, or sturdier. Here are a few antonyms for "more wafer-thin": thick, chunky, hefty, substantial, bulky, dense, solid, and weighty. These words convey a sense of stability and strength, rather than fragility. They describe objects that are likely to have some weight to them and feel substantial in your hand. While "more wafer-thin" may describe a delicate piece of paper or a wafer-thin slice of cucumber, these antonyms could describe a hearty steak or a thick, sturdy book.