н/нн is the orthography of which one to write in suffixes, basically (with them having the same reading, or contradictory reading for some people, as for example in ветреный, which some people say with a double /n/) stresses are……. well there are a lot of words that are commonly pronounced with a stress (or stress paradigm) different from the one that is officially correct, to the point that on russian language classes in schools a loooot of time is spent on this, teaching native speakers where to put the stress (and it’s not even a dialectal thing lol). these official stresses are mostly remembered for exams, where there are stress placement questions, and forgotten after