1. A place where arms are deposited or made; armour; arms; an armorial ensign; skill in heraldry.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• armourd,
• aromory,
• armord,
• amoury,
• armony,
• arour,
• armoy,
• armry,
• harmory,
• armoir,
• amouny,
• armury,
• amory,
• aroura,
• archury,
• armoure,
• armore,
• armorey,
• armory,
• armouree

• armoire,
• armor,
• armorial,
• armorer,
• armoured,
• armored,
• armoracia,
• armourer,
• armory,
• armour.

The adjective form of the word "armoury" would be "armoury" itself. However, it is more commonly used as a noun.

The plural of the "armoury" can be the "armouries".

The singular of the "armoury" can be the "armoury".