Parallel universe
- Alternate history
- Alternate reality (disambiguation)
- Alternative universe (fan fiction)
- Extended modal realism
- Many-worlds interpretation
- Metaverse
- Mirror Universe (Star Trek)
- Modal realism
- Multiverse
- Multiverse (disambiguation)
- Otherworld
- Parallel Dimensions (album)
- Parallel Universe (4hero album)
- Parallel Universe (Garnet Crow album)
- Parallel Universe (Red Dwarf)
- Parallel Universe (song)
- Parallel Universes (film)
- Parallel World (disambiguation)
- Parallel universes in fiction
- Plain White T's
- Possible world