I think that caresses in silence can be deeply emotionally meaningful, and, a huge turn on (even though I am very verbal and like language). There really is no rule that says that you have to accompany caresses with anything. It is not a movie with captions - you do not need words.

Also (not that I have gone to, because they are expensive, but I know of them), one of my yoga teachers hosts "silent retreats". I think it is a Buddhist tradition, but not sure. They rent a place up in the mountains, and participants joins for a weekend of silence. I am sure it is deeply meaningful for them.