Acid : Sour Taste :: Base : ?

Acids are known for their sour taste, like lemons or vinegar. Bases, on the other hand, give a bitter taste, as seen with baking soda or soap. The reasoning is that acids contain hydrogen ions that stimulate sour receptors, while bases contain hydroxide ions that stimulate bitter receptors. For example, tasting a weak sodium hydroxide solution would feel distinctly bitter. Thus, the answer is bitter.