80+ Irregular Plural Nouns List (Irregular Nouns Singular and Plural)


Irregular Plural Nouns! Most nouns form their plurals, or we pluralize most nouns when s is added to the singular, as in dogs. These are called regular nouns. But some nouns can be made plural without adding s to the singular. They don’t end in -s, -es, -ies or -ves. Instead, the word changes form. The nouns that are pluralized in other ways are called irregular nouns. In this article, you’ll learn 80 examples of irregular nouns with their plural forms.

How To Form Plural of Irregular Nouns?

These nouns form their plural in several different ways. The following are some ways we can use to make the plural of irregular nouns.

  1. Changing a vowel: for example, singular: man, plural: men
  2. Adding ‘‘ren’’or ‘‘en’’: singular: child, plural: children
  3. Adding nothing, for example, singular: fish plural: fish
  4. Changing ‘‘f’’ to‘‘v’’and then adding ‘‘s’’  for example, singular: knife, plural: knives

Some plural nouns are the same as singular nouns but are also included in this list.

Irregular Plural Nouns List

80 Examples of Irregular Plural Nouns

SingularPlural
AddendumAddenda
Alumna (Fern.)Alumnae
Alumnus (Masc.)Alumni
AnalysisAnalyses
BeefBeeves
AxisAxes
BisonBison
AntithesisAntitheses
CannonCannon
BacteriumBacteria
AppendixAppendices
BasisBases
CarpCarp
CactusCacti
CodCod
CherubCherubim
CriterionCriteria
CrisisCrises
ChildChildren
Chassis  Chassis
ChateauChateaux
CurriculumCurricula
DormouseDormice
DeerDeer
DatumData
DieDice
DiagnosisDiagnoses
FungusFungi
ElfElves
EmphasisEmphases
GooseGeese
GeniusGenii/ Genera
EllipsisEllipses
EmphasisEmphases
FootFeet
FishFish (Fishes— Different Kinds)
FocusFoci/Focuses
Genus  Genera
HalfHalves
HoofHooves
HypothesisHypotheses
LoafLoaves
LocusLoci
KnifeKnives
LeafLeaves
LouseLice
LifeLives
ManMen
MaximumMaxima
MetamorphosisMetamorphoses
MinimumMinima
MalleusMallei
MouseMice
OasisOases
OurselfOurselves
OxOxen
PlaicePlaice
ParenthesisParentheses
PhenomenonPhenomena
PikePike
RadiusRadii
ReindeerReindeer
SelfSelves
SheafSheaves
SeraphSeraphim
SheepSheep
StadiumStadia
SwineSwine
SynopsisSynopses
SyllabusSyllabi
SynthesisSyntheses
SalmonSalmon
SquidSquid
TerminusTermini
ThesisTheses
ToothTeeth
ThiefThieves
TurbotTurbot
TroutTrout
VertebraVertebrae
VirtuosoVirtuosi
YourselfYourselves
WifeWives
WolfWolves
WomanWomen
Examples of Irregular Plural Nouns

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