This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. the quality of being substitutable; the capacity to be substituted.

n. exchangeability by virtue of being replaceable

"The assessment methodology would be based size, interconnectedness, lack of substitutability, global activity and complexity of the banks."

fungibility    interchangeableness    interchangeability    exchangeability