Carboxylate ion is more stable than phenoxide ion;Resonance structures of carboxylate have negative charge delocalized on electronegative oxygen atom moreover they are indistinguishable; Carboxylate ion is more stable;Resonance structures of phenoxide ion have negative charge delocalized on carbon atom also, they are unequivalent;  Phenoxide ion is less stable;Phenols are less acidic than carboxylic acids;