Words you pronounced wrong
I was in my fifties when I learned that 'chasm' is pronounced 'casm'. And I had to be corrected by a guy who speaks English as a second language.
Hirsute. No a big deal, but I didn't realize that it was pronounced 'hirsuit'.
Bury, buried. My wife corrected me on this when I was in my 30s. I always said it like it's spelled, 'brrr-y' rather than the correct "berry". In my defense though, I've occasionally encountered other people who pronounce it wrong. We were watching a movie some nights ago and one the actors pronounced it my way, so now I'm not sure I'm wrong.
About. I'm Canadian and I pronounce it 'abowt'. Apparently, I should be pronouncing it 'aboot' according to Americans, LOL.