propension

CIDE DICTIONARY

propension, n. [L. propensio: cf. F. propension. See Propend, Propense.].

 The quality or state of being propense; propensity.  M. Arnold.  [1913 Webster]
"Your full consent
Gave wings to my propension."  [1913 Webster]

ROGET THESAURUS

propension

Affections

N affections, affect, character, qualities, disposition, nature, spirit, tone, temper, temperament, diathesis, idiosyncrasy, cast of mind, cast of soul, habit of mind, habit of soul, frame of mind, frame of soul, predilection, turn, natural turn of mind, bent, bias, predisposition, proneness, proclivity, propensity, propenseness, propension, propendency, vein, humor, mood, grain, mettle, sympathy, soul, heart, breast, bosom, inner man, heart's core, heart's strings, heart's blood, heart of hearts, bottom of one's heart, penetralia mentis, secret and inmost recesses of the heart, cockles of one's heart, inmost heart, inmost soul, backbone, passion, pervading spirit, ruling passion, master passion, furore, fullness of the heart, heyday of the blood, flesh and blood, flow of soul, energy, fervor, fire, force, affected, characterized, formed, molded, cast, attempered, tempered, framed, predisposed, prone, inclined, having a bias, tinctured with, imbued with, penetrated with, eaten up with, inborn, inbred, ingrained, deep-rooted, ineffaceable, inveterate, pathoscopic, congenital, dyed in the wool, implanted by nature, inherent, in the grain, affective, in one's heart, at heart, heart and soul, affection is a coal that must be cool'd else suffe.