I have the same problem when my spell checker won’t catch when I mistakenly write “jerk” for “Obama.” They are both words, so it does not edit...or maybe it knows somethings more than I think it does...
I see that you, like me, don't use obscenities. Most of the time I don't regret it. However, it certainly does hamper my ability to refer appropriately to that, that, Imperial, arrogant, festering, Alinsky-esque mountebank.