esoterica
specialized or obscure knowledge known by a small group
Root
- eso- / esoter: within, inner, or for insiders
Other words with the eso- / esoter root
- esoteric: intended for or understood by only a small inner group
- esotericism: belief in or study of hidden inner knowledge
Esoterica is the material on the inner-circle shelves: facts, terms, rituals, or trivia only insiders tend to know.
His room was full of movie esoterica: scripts, alternate cuts, and production notes no casual fan had seen.
Esoterica is not just a pile of weird facts. The root gives it geography: the knowledge sits inside a smaller circle.
That can be charming, annoying, useful, or exclusionary depending on the context. The word names the insider quality.