Below you will find a list of English nouns that have the same form in both singular and plural:
- Deer – Deer
- Sheep – Sheep
- Fish – Fish
- Species – Species
- Aircraft – Aircraft
- Watercraft – Watercraft
- Spacecraft – Spacecraft
- Hovercraft – Hovercraft
- Moose – Moose
- Swine – Swine
- Shrimp – Shrimp
- Plankton – Plankton
- Offspring – Offspring
- Salmon – Salmon
- Squid – Squid
- Trout – Trout
- Series – Series
- Species – Species
- Headquarters – Headquarters
- News – News
- Economics – Economics
- Physics – Physics
- Mathematics – Mathematics
- Statistics – Statistics
- Billiards – Billiards
- Aesthetics – Aesthetics
- Ethics – Ethics
- Logistics – Logistics
- Politics – Politics
- Chassis – Chassis
- Corps – Corps
- Elite – Elite
- Flounder – Flounder
- Grouse – Grouse
- Herring – Herring
- Quail – Quail
- Reindeer – Reindeer
- Sockeye – Sockeye
- Whiting – Whiting
- Wildebeest – Wildebeest
- Bison – Bison
- Buffalo – Buffalo
- Caribou – Caribou
- Elk – Elk
- Gazelle – Gazelle
- Pike – Pike
- Plaice – Plaice
- Seabass – Seabass
- Series – Series
- Shears – Shears
