Just being in aggreeance about what something means doesn't make it objective. When we speak or write we are 'formatting' our thoughts so they can be shared, and to many other extents we communicate with our body and it's simple reactions like wincing or wide eyes this is almost involuntary for many. The content of all of those verbalizations can be and almost always is subjective. Language places a thought you wish to convey into terms like '# 5' into both verbal and symbolic representation. That seems fairly arbitrary and feels subjective. If it is true that the concept behind the number 5 in mathematics is objective (becuase saying so is really only a subjective opinion of mine) then words by thier existance are objective and thier uses are generally subjective. When we bend the objective sense of a word because of subjective uses what are we doing?