I have built several and given them names I have not seen any where else.
A rocket that used a paint roller cover and flew on an F motor. "Fast and and Furriest."
A Hi-Flyer like rocket I called "Performance Anxiety" - it separated just above the fin can, and was a rear motor eject parachute or streamer deploy.
A rocket made from tubes I found in wax paper, aluminum foil, and Saran Wrap, and toilet paper rolls, ... I wound up calling it "Everything But the Kitchen Sink." It is a two stage rocket, and the booster was a four motor cluster.
I up-scaled a US Rocket, Sentra, which has side pods that are attached permanently - mine were detachable in flight. Instead of calling it 'Sentra' - I called it, "Know Quid Pro Quo," as that phrase was being repeated all over the place during the build. One of my club colleagues said I spelled "No" wrong. I know I didn't.
I have started to delve into geometric shapes. Another club member, much younger, showed up a month ago with a flying "Dodecahedron" a ten sided angular looking thing he called "Crystal." He elongated two of the sides of the lower half of the pentagons that compose this thing. He said he made the top half "aerodynamically friendly," (a mirror image of the lower half - though pointy ...) He flew it twice and it flew well. He said he 3D printed it using a special PLA at a certain temperature so that it would foam up and be less dense, and save weight and quicken the printing process. Unlike other 3D printed objects, it did feel very light and it did seem pretty tough, to the touch.
I have been playing with tetrahedrons. Those are four sided 3D objects, each side is some sort of triangle. I have been flying a "Double Ended Tetrahedron"
Imagine a 3 sided pyramid with an equilateral triangle base.... and something similar underneath, but shorter, and sprouting 3 fins. It flies on E12 -4s. A longer delay would be too long. It is made of cardboard but uses Basswood fins.