arsenal
n. countablen. a collection of weapons or a place where they are kept. You can also use it to describe a wide range of skills or tools you have to solve a problem.
n. a collection of weapons and military equipment, or an establishment for the manufacture or storage of such items. Figuratively, it refers to the entire range of resources or skills available to a person or group.
The country is slowly reducing its nuclear arsenal.
The lawyer used every legal trick in her arsenal to win the difficult case.
While the city's historic arsenal now serves as a museum, it remains a stark reminder of the region's strategic importance during the nineteenth-century border conflicts.
From Italian arsenale, from Arabic دَار الصِّنَاعَة (dār aṣ-ṣināʕa, “manufacturing shop”), from دَار (dār) + صِنَاعَة (ṣināʕa).
Often used with the preposition 'in' when referring to a figurative collection of skills.