And it is even more important for precision, when a less common word is closer to what you want to say than a more popular one. This is one point Robert Heinlein made in Expanded Universe when he was defending Doc Smith's "space operas" and the vocabulary that was used in them. (Note that since "the map is not the territory", nothing, not your thoughts or even a physical description, can be exactly captured in words, but that doesn't mean it is not sometimes important or at least useful to try to be as precise as possible.)