There are a lot of different schema that you can use.
For example Shinzen Young suggests stuff like "feel-in" for emotional body sensations, "feel-out" for normal physical body sensations, "see-in" for internal images, "see-out" for external sites, "hear-in" for internal dialogue, "hear-out for external sound, "gone" for the passing of a sensation, and stuff like "feel rest" for the absense of a sensation (if you notice it):
http://www.shinzen.org/Retreat%20Reading/FiveWays.pdfAnother thing that I have started doing is to limit to around 10 notes, all oriented around the 3C's directly. So for example, I will give notes like "aversion", "craving", or "clinging" for the suffering C, notes like "arising" and "passing" for the impermanence C, and notes like "empty", "not mine", or asking stuff like "who feels" for the not-self C.
Another option, continue with the list of words that you already have, and then during the course of meditation, if sensations come up that feel like they need more clarification, reflect afterwords (not during) what additional note(s) you would use. So during the meditation if you felt something like "vulnerability", note it as "sensations" and then decide afterwords that you will use the new words whenever that same feeling comes up again. In this way you can develop a specific vocabulary naturally and over time that is yours.
I hope this helps