We've always teased my mom that we'll never know if she gets Alzheimers because the woman has never been able to call things by their correct names. I remember her getting REALLY angry at me when I was a kid when she told me urgently, "Go get the thing off the thing for me." When I looked at her blankly, she lost it. "YOU KNOW WHAT I MEAN!!!" Maybe in psychic world I do, lady, but I left my crystal ball in the other room.
She's 75 now and I haven't really noticed her pronouncing things differently. She still doesn't know what normal everyday items are called though. Things, hickeydoos, thingamabobs--those she knows.