We have put together a list of words that are similar to USABILITY.

6 Alternative Words Similar to usability

3 Usableness Noun      Synonym Words Like Usableness
4 Useableness Noun      Synonym Words Like Useableness
5 Usefulness Noun      Synonym Words Like Usefulness
6 Utility Noun      Synonym Words Like Utility

3 definitions of usability

1 the quality of being able to provide good service
2 The state or condition of being usable.
3 The degree to which an object, device, software application, etc. is easy to use with no specific training.
We get our data from many different dictionaries across the web:
Wordnik, Wiktionary, Century, American Heritage, Gcide