Badass Normal: Someone without super powers who does cape work anyway and holds their own against their super powered counterparts.
Black Cape: A supervillain.
Blue Cape: Someone who uses their super powers for their regular job.
Cape: Someone with super powers. It's a bit of misnomer as (1) most people doing cape work don't wear capes, (2) not everyone with super powers does cape work, and (3) some heroes and villains don't have super powers.
Cape Work: Doing superhero and supervillain stuff.
The Code: A set of mutually agreed rules governing cape work. It covers stuff like medical neutrality, keeping hero/villain activity on the job, minimizing bystander harm, avoiding permanent injury or death. Violations of the Code negatively impact your reputation and if severe enough, will lead to you being blacklisted by the cape community as a whackjob.
Gear: The stuff one uses for cape work, including the super suit.
Grey Cape: An antihero.
Invisible Cape: Someone who hides or tries to hide their superpowers.
Manifestation: When one's super powers became active.
The Mask: The alternate identity. For many, this is their hero or villain identity but some consider their civilian identity to be The Mask and the hero or villain identity to be their true self.
Origin: Debut of one's Mask identity.
Super Suit: What someone wears while doing cape work. They are made either out of ordinary materials or the growing number of super fabrics.
White Cape: A superhero.