The experience of how perceiving the sound "C3" is different from perceiving the sound of a raindrop also seems very incommunicable. I don't think I could communicate it to a person who's completely deaf.

I don't think that's what you need the name for. tzachquiel speaks about "metadata". A name adds "metadata" that goes beyond what was there beforehand.

Emotions are quite interesting in that regard. It changes things to put a label on a sensation. In Focusing, putting a label on the sensation is an essential part. It's also a step in the Sedona method. Taking a label away can also make certain process such a EmoTrance easier.

If you want to describe how you are angry you can talk about how your heart rate rises and how you feel sensations in your belly but the label "anger" adds incommunicable metadata to it. It changes the experience.

Fear also raises emotions and might also let's you feel sensation in your belly but it's different in a way that just doesn't boil down to raised heart rate and inner movement.