This is really prevalent in sailing. Sailing has a language of it's own and it amazes me to see people learning to sail without bothering to learn the lingo. How do they expect to communicate with other sailors?
Examples:
Pennant when the mean pendant.
Wench for winch.
"My ground tackle consists of 30' of chain and 200' of rode". The anchor rode is the rope and the chain combined, not another word for rope.
People go into a chandlery and ask to buy some line. It's rope that they want to buy not line. The rope becomes a line when it is attached to a boat for a specific purpose. If they ask for a pre-spliced halyard that would be a line.
Main salon when they mean saloon. A salon is where your wife gets her hair done. The saloon is traditionally the main cabin on a boat.
Boom bang. It's not a bang it's a vang.
Prop wash when they mean prop walk.
Down haul when they mean Cunningham...the list is endless. Drives me nuts.
