hospitalization

noun

hos·​pi·​tal·​iza·​tion

variants or chiefly British hospitalisation

ˌhäs-(ˌ)pit-ᵊl-ə-ˈzā-shən 

1

: the act or process of being hospitalized

pain persisted constantly through a two-day period, finally necessitating hospitalization

—The Journal of the American Medical Association

2

: the period of stay in a hospital

drug treatment shortened the length of hospitalization

—Today's Health