Synonyms know each other like old colleagues, like a set of friends who've seen the world together. They swap stories, reminisce about their origins and forget that though they are similar, they are entirely different, and though they share a certain set of attributes, one can never be the other. Because a quiet night is not the same as a silent one, a firm man is not the same as a steady one, and a bright light is not the same as a brilliant one because the way they wedge themselves into a sentence changes everything.