My mom pronounces the word "mature" weird. She says "matt-ure" instead of "match-ure."
She also says "contimeter" instead of "centimeter."
I like to pronounce al-you-min-e-um for aluminum. I knew a guy that said bat-tree for battery. I think he did his own auto work too instead of taking it to a dealer and reading Car and Driver while waiting for the work to get done.