Some of these are legitimate, others are just downright silly.
- List of aircraft by tail number
- List of artistic depictions of dyslexia
- List of athletes on Wheaties boxes
- List of cars with non-standard door designs
- List of censored T-shirts
- List of chemical compounds with unusual names
- List of college dropout billionaires
- List of coupled cousins
- List of Crayola crayon colors
- List of discredited substances
- List of Disney attractions that were never built
- List of divided islands
- List of English words containing Q not followed by U
- List of English words without rhymes
- List of eponymous laws
- List of ethnic slurs
- List of Evel Knievel career jumps
- List of feuds in the United States
- List of fictional ships
- List of gestures
- List of ghosts
- List of Humble Bundles
- List of hypothetical Solar System objects
- List of individual dogs
- List of interstellar radio messages
- List of kakapo
- List of lists of lists
- List of Mafia crime families
- List of man-made objects on the Moon
- List of missing treasure
- List of musical works in unusual time signatures
- List of mythological objects
- List of names in English with counterintuitive pronunciations
- List of octagonal buildings and structures
- List of people considered father or mother of a field
- List of people who have lived at airports
- List of people who took refuge in a diplomatic mission
- List of people with reduplicated names
- List of poker hand nicknames
- List of potato museums
- List of Presidents of the United States with facial hair
- List of problems
- List of rock formations that resemble human beings
- List of rocks on Mars
- List of scandals with "-gate" suffix
- List of ships captured in the 18th century
- List of soft drink flavors
- List of stoffs
- List of topics characterized as pseudoscience
- List of trees
- List of unexplained explosion events
- List of unexplained sounds
- List of unicorns
- List of unused highways
- List of unused roads in the United Kingdom
- List of unusual deaths
- List of U.S. state partition proposals
- List of walls
- List of wars extended by diplomatic irregularity
- List of world's largest roadside attractions