Re: tamper-proof screws aren't
Pedantically speaking you are correct but out in The Real World(tm)* you'll find "countersunk" used for any recess at the top of a fastener hole. Most of them are neither "sunk" nor "bored" but cast, moulded or, in the case of almost all I produce, 3D printed. :-)
* A scary place. I recommend avoiding it as much as possible.
Biting the hand that feeds IT
