| skos:altLabel | - Perpetual
- free energy
- Perpetuum Mobile
- Perpetual Motion
- perpetual
- perpetually
- second kind
- Perpetuum mobile
- moto perpetuo
- perpetual motion
- perpetuum mobile
- free-energy
- Perpetual Motion Machine
- Perpetual Motion Squad
- Perpetual motion#Classification
- Perpetumobile
- near-perpetual
- near-perpetual movement
- perpetual energy
- perpetual motion machine
- perpetual motion machine of the first kind
- perpetual motion machine of the second kind
- perpetual motion machines
- perpetual-motion machine
- perpetually rotating
- perpetuated
- perpetuum-mobile
- waste more electricity than it generates
- without any kind of power source
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