na-adjective, noun
Often used in formal or written contexts, especially in compounds like 利便性 (convenience, ease of use). As a standalone noun/adjectival noun, it is less common than 便利.
この地域の交通の利便は年々向上している。
The convenience of transportation in this area is improving year by year.
利便性を重視して、駅近の物件を選
Prioritizing convenience, I chose a property near the station.