A period of inactivity can be referred to by many different terms, such as STASIS (6 letters), DOWNTIME (8 letters), LATENCY (7 letters), REST (4 letters), LULL (4 letters), and QUIETUS (7 letters). STASIS is a state of inactivity or equilibrium, while DOWNTIME is a period of inactivity due to a system or machine being shut down. LATENCY is the time it takes for a system to respond to a request, while REST is a period of inactivity or relaxation. LULL is a period of inactivity or calmness, and QUIETUS is a period of inactivity or death.