1. Inclination downward; land or a surface that slopes downward.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• decliviotus,
• seclivity,
• xeclivity,
• ceclivity,
• feclivity,
• reclivity,
• eeclivity,
• dwclivity,
• dsclivity,
• ddclivity,
• drclivity,
• declivitty,
• declivaty,
• decidity,
• declivius,
• Deceitivty,
• declivitey,
• declevity,
• declivite,
• declivtey

• declivitous.

The adjective form of the word "declivity" is "declivitous".

The plural of the "declivity" can be the "declivities".

The singular of the "declivity" can be the "declivity".