THESAURUS
tropism
a thing for, affinity, aptitude, aptness, bent, bias, cast, conatus, conduciveness, delight, diathesis, disposition, eagerness, feeling for, inclination, leaning, liability, liking, penchant, predilection, predisposition, prejudice, probability, proclivity, proneness, propensity, readiness, sensitivity to, soft spot, susceptibility, tendency, turn, twist, warp, weakness, willingness