"Apparently sound" is a term frequently used to describe something that appears to be healthy or functioning properly, but may not actually be so. Some synonyms for "apparently sound" include "seemingly healthy," "ostensibly in good condition," "externally robust," "superficially strong," and "seeming to be in good shape." Other similar phrases that convey a similar meaning include "deceptively stable," "outwardly competent," "facetiously fit," and "implying health." These synonyms highlight the need to look beyond the surface and investigate more comprehensively to ensure that something is truly healthy and functioning at its optimal level.