While and whilst are interchangeable and are both correct. Towards and toward, similarly. Quite often, having a pet peeve about such things puts you in the category of grammar policeperson. Use the form you're most comfortable with, and raise barely an eyebrow at usage that doesn't align with yours. Whether you like it or not, language is wot people speak, not a bunch of rules penned by professors in ivory towers. The main issue to rail against in language is degradation, losing important nuances: you're bit of a tit if you say alternate when you mean alternative, for example. Oh, and pomposity, as exhibited by persons who talk about on a daily basis, at this moment in time, prior to, albeit and going forward...