- leaning, propensity, tendency - an inclination to do something; "he felt leanings toward frivolity"
--1 is a kind of inclination
- proclivity, propensity, leaning - a natural inclination; "he has a proclivity for exaggeration"
--2 is a kind of inclination, disposition, tendency
- aptness, propensity - a disposition to behave in a certain way; "the aptness of iron to rust"; "the propensity of disease to spread"
--3 is a kind of disposition