What part of speech is interchangeabilities?

Interchangeabilities can be categorized as a noun.

Parts of speech

• 1. interchangeabilities is a noun, plural of interchangeability.

Inflections

Noun

• Singular

  Plural
• interchangeability 

  interchangeabilities 

• Singular: interchangeability 
• Plural: interchangeabilities 

What does interchangeabilities mean?