Subclinical is a term used to describe a medical condition that is present but does not show any noticeable symptoms. There are several synonyms for the word subclinical, including asymptomatic, latent, hidden, silent, and concealed. Asymptomatic refers to a condition that is present but without any symptoms and is often used in the context of infectious diseases such as COVID-19. Latent refers to a condition that is present but not yet active or visible. Hidden, silent, and concealed all describe a condition that is not readily apparent or easily detectable. These synonyms are useful for describing medical conditions that may be present without being immediately noticeable.