Unfortunately, this. I did coverage work for WoTC for a few years and my custom dictionary is ridiculous.
For bonus points, I've also reviewed 200+ Spec Fic novels, so the amount of weird pronouns in the list is spectacular.
This is a cool idea, and a cool source for a rational anki deck. I'd post mine, but I don't add any custom spellings to chrome.
I looked at my custom spelling dictionary in Google Chrome, and thought custom spelling dictionaries in general might be a good place for you to look if you wonder what kinds of terms you'll have to explain to people to help them understand what you mean. If something's on your list, then you would probably have to provide an explanation of its usage to a given random individual from the world population.
Here's my list:
anthropogenic
attentional
attentionally
automaticity
beisutsukai
bulletpoint
ceteris
combinatorially
commentariat
credences
curation
disanalogies
Eliezer
epistemic
evolutionarily
formidability
fortiori
gedanken
Gwern
hierarch
impactful
indexical
interpretable
Kahneman
LW
LWers
maladaptive
metacognition
metacognitive
metamemory
MIRI
Newcomblike
normatively
paribus
percepts
prefrontal
pseudonymity
pseudonymously
relatable
situational
superintelligence
underconfidence
underconfident
unobservable
unsimplified
updateless
whistleblow
Share yours, too, if you'd like. Maybe something interesting or useful will come out of it. Maybe there will be patterns.