There are several synonyms for the phrase "weapon system reliability" that can be used in various contexts. One of these synonyms is "operational readiness," which refers to the ability of a weapon system to perform its intended functions when needed. Another synonym is "combat readiness," which implies the readiness level of a weapon system in combat situations. "System availability" is also somewhat synonymous with weapon system reliability, as it describes the level of access to a weapon system at any given time. Other similar terms include "equipment reliability," "technical proficiency," and "weapon system effectiveness." Ultimately, these synonyms all describe the dependability and effectiveness of a weapon system.