"There are many varieties of chili peppers that often have different names depending on the region. Plus, new, hotter variations are always being worked on in attempt to claim the Trinidad Moruga Scorpion's title of World's Hottest Pepper. Below is a comprehensive list, that includes their Scoville rating, along with a pic of each pepper.
These are listed in order from the 'hottest' to 'no heat'. If I'm
missing a pepper here, please let me know and I'll get it listed! This
list is more about hot peppers, and many of the sweet bell pepper
varieties are not included."
The Big List of Peppers