-cy

Suffix
-cy

Used to form nouns from adjectives, indicating a state, quality, or condition.
His accuracy in shooting was remarkable. (accurate + cy)

The queen asserted her supremacy over all the land. (supreme + cy)
Used to form abstract nouns from certain nouns denoting roles, titles, or professions, often related to states, practices, or governance.
The country's democracy allowed people to vote freely. (democrat + cy)

The age of piracy lasted for many years. (pirate + cy)

The diplomacy between nations helped maintain peace. (diplomat + cy)

Suffix