WordNet sense 1 (able to feel or perceive):

sensitive

WordNet sense 2 (exercising or showing good judgment):

intelligent, sound

WordNet sense 3 (showing reason or sound judgment):

reasonable

WordNet sense 4 (capable of being perceived by the mind or senses):

perceptible

WordNet sense 5 ((sometimes followed by `of') having or showing knowledge or understanding or realization or perception):

aware, cognizant, cognisant