WordNet sense 1 (the statement (oral or written) of an exchange of promises):

agreement

WordNet sense 2 (an inclination to support or be loyal to or to agree with an opinion):

sympathy

WordNet sense 3 (the cognitive condition of someone who understands):

apprehension, discernment, savvy

WordNet sense 4 (the capacity for rational thought or inference or discrimination):

intellect, reason

WordNet sense 5 (having the ability to perceive or understand; keen in discernment):

perceptive