Definitions:

1. Capable of being lived-in; suitable for habitation. ADJECTIVE
   • If you love the fact that your city is a great place for all different types of people to live, you appreciate its habitability.
2. The quality of being good enough to live in. ADJECTIVE
   • Scientists are studying the habitability of different planets.

Synonyms:

• fit to inhabit
• fit to occupy
• habitableness
• livable
• usable