Nouns with the same plural and singular forms
In English there is a group of nouns with the same singular and plural forms. Here it is a list with some examples of such nouns.
Singular = Plural:
- bison
 - deer
 - greenfly
 - grouse
 - moose
 - reindeer
 - sheep
 - cod
 - fish
 - goldfish
 - halibut
 - mullet
 - salmon
 - shellfish
 - trout
 - whitebait
 - aircraft
 - hovercraft
 - spacecraft
 - crossroads
 - dice
 - fruit
 - gallows
 - grapefruit
 - insignia
 - mews
 - offspring
 - series
 - species
 - bourgeois
 - chassis
 - corps
 - patois
 - precis
 - rendezvous
 - means