Merriam-Webster Collegiate Dictionary - leaning

 noun  Date: 15th century a definite but not decisive attraction or tendency — often used in plural radical ~s Synonyms:  ~, propensity, proclivity, penchant mean a strong instinct or liking for something. ~ suggests a liking or attraction not strong enough to be decisive or uncontrollable a student with artistic ~s. propensity implies a deeply ingrained and usually irresistible inclination a propensity to offer advice. proclivity suggests a strong natural proneness usually to something objectionable or evil a proclivity for violence. penchant implies a strongly marked taste in the person or an irresistible attraction in the object a penchant for taking risks.