I like to pay attention to details of speech and expression. I don't remember who said it. I don't remember what was being discussed. I remember the misspeak. Symbolence.
I think the speaker probably intended "semblance," but she said (or I heard) "symbolence." I immediately purchased the domain name.
Why do I like symbolence? It is a word that describes a common feature of many of my interests. Music is symbolic (at least written music is unambiguously symbolic). Astrology is symbolic. Electronics is symbolic. Computer programming is symbolic. If we take the Webster's definition of the -ence suffix (instance of an action or process) each of those areas can be thought of as a symbolence. That is, an instance of an action or process that is symbolic.