[bane]

This generalizes and is reinforced even more into words of Germanic origin being automatically considered lower register, while Latin and Greek words being assumed to be higher.

e.g. valediction instead of farewell

https://en.wikipedia.org/wiki/List_of_Germanic_and_Latinate_...

[thaumasiotes]

Not a great example; "farewell" is so archaic that it won't be understood as low register. It will be understood as purposefully fancy.