Resilience is often used to describe the capacity of individuals, communities, or systems to bounce back from adversities. On the other hand, resiliency is synonymous with resilience but emphasizes the state or quality of being resilient.

Resilience and resiliency are different forms of the same word. Both nouns refer to the ability to recover quickly from illness or misfortune. But  in today’s English, resilience is far more common than resiliency, especially outside the U.S. and Canada. In North American publications, resilience appears about four times as often as resiliency.

These words have the same meaning, but many advise against one of them. Resilience is a noun that means able to withstand hardship. Resiliency is commonly labeled a needless variant. Stick to resilience in your own writing.

Resilience and Resiliency both refer to the ability to recover from difficulties, but "resilience" is more commonly used in general contexts, while "resiliency" is often employed in technical and specialized fields.