: the quality or state of being replaceable.
What is a replaceable person?
If you say that someone is replaceable, you mean that they are not so important that someone else could not take their place. He would see I was not so easily replaceable. English. Grammar.
Is Replaceability a noun?
Dictionary entry overview: What does replaceability mean? Familiarity information: REPLACEABILITY used as a noun is very rare.