Precisely adverb – As stated or indicated without the slightest difference. Flawlessly and precisely are semantically related. You can use "Flawlessly" instead an adverb "Precisely". Nearby Words: precise, precision, precising
For this to work, everyone would have to be standing in perfect proximity, the car would have to be parked precisely in the right area, the building's composition and orientation would have to be perfectly aligned, and most of all, this contraption would have to work flawlessly.