The meanings of words are also changing - and not for the better. In fashion, there are no longer colors and fabrics but colorations and fabrications, instead; and couture, which is merely the French word for clothing, has lost its "haute" (the phrase haute couture used to mean high fashion, the expensive designer stuff). Now couture all by itself is used to mean haute couture, which must make us sound even more stupid to the French than we already do. In both fashion and food, decadent has become a synonym for sophisticated, and while they might be considered first or second cousins, they're not the same.
In real estate, house and home have become synonymous, which at the very least is insulting to those of us who make our homes in apartments. But whatever the structure may be, even when there are walls and doors (rather than "open concept"), there are no more rooms, there are areas. In general usage, I once heard someone compliment someone else by saying "You're totally superfluous," but I don't know if that's caught on. The one that has and makes me grit my teeth every time I hear it is downfall when what is meant is downside. I get similarly upset when I hear people say infamous, which of course mean famous for something terrible, as in "Charles Manson is infamous," but is now being used to mean very famous. I understand that new words must enter the language as new things enter the world, but I have no patience with the misuse and unnecessary changes of words.