Edit: If you're worked up about "stigmata", just wait for "schemata", "indices", and "alumni".
I only point out typos that are silly, so with that in mind: Stigmata is where you develop sores or bleeding on your hands as some sort of weird solidarity with Jesus. I imagine that would make writing papers harder.
1 a archaic : a scar left by a hot iron
b : a mark of shame or discredit
> "When the plural form stigmata is used, it usually refers to the nail wounds on Christ's hands and feet, wounds which have sometimes reappeared on the hands or feet of later worshippers such as St. Francis."