For all its faults, we can thank Subway for partially solving this problem.
Wedge will get you a salad most places in the us. Hero might get you a gyro or ask for clarification. Grinders seem specities in much of the us.
A 'hero' is just a gyro with bastardized spelling.
I have seen Heroes that are much more like hoagies and I am seeing Heroes like the Greek rap depending on where you are in the countrymy point overall is there doesn't seem to be definitive things or just a lot of regional uses and spellings of these differentfood types by region so if you're cleaning that there's only one it probably means you haven't traveled enough
The terms are unrelated [a sandwich named hero predates the appearance of the Greek item]; though they may sound the same depending on how they are pronounced. A hero is just a submarine sandwich by another name. A gyro is a pita-wrap --mostly pronounced like the 'gyro' in gyroscope but also like /yirou/ or /hirou/
Ich bin ein Hoagie
Spuckie?
Apparently from spucadella, an italian-american word for a type of bread.
I've never heard anyone use it myself, but then I've never tried to order the sandwich otherwise known as a sub in the parts of the country where that name is used.