Rules Of Plural बहु वचन बनाववानी रित:

��Regular Plurals:
Rule:1 nouns + s (regular plural)
 
• bag  = bags
• cup  = cups
• email  = emails
• god  = gods
• house = houses
• student = students

Rule:2 nouns ending with …x/ch/sh/s/ss/z/zz  +  es (regular plural)

• bench = benches
• box  = boxes
• bus  = buses
• buzz  = buzzes
• class  = classes
• dish  = dishes
• whiz(z) = whizzes
Exception :
• epoch = epochs
• stomach = stomachs

3 nouns ending with …o  +  es (regular plural)

• buffalo = buffaloes
• domino = dominoes
• echo  = echoes
• hero  = heroes
• mango = mangoes
• potato = potatoes
• tomato = tomatoes

Exceptions …o  +  s(regular plural)

• auto  = autos
• kilo  = kilos
• memo = memos
• photo  = photos
• piano  = pianos
• studio = studios
• zoo  = zoos

Nouns ending with …o  +  s/es  (regular plural)

• cargo  = cargos/cargoes
• zero  = zeros/zeroes

4 nouns ending with …consonant + y = ies (regular plural)

• baby  = babies
• daisy  = daisies
• fly  = flies
• lady  = ladies
• story  = stories

5 nouns ending with …vowel + y = s  (regular plural)

• boy  = boys
• chimney = chimneys
• day  = days
• essay = essays
• key  = keys
• play  = plays
• toy  = toys
• valley  = valleys

Rule:6 nouns ending with …f/fe = ves  (regular plural)

• knife  = knives
• life  = lives
• loaf  = loaves
• scarf  = scarves
• self  = selves
• thief  = thieves
• wife  = wives
• wolf  = wolves

Exceptions :
• belief  = beliefs
• chief  = chiefs
• cliff  = cliffs
• roof  = roofs

��Irregular Plurals:
Rule:1 a = e(Irregular Plural)
 
• gentleman = gentlemen
• man   = men
• policeman = policemen
• postman = postmen
• woman = women

Rule:2 en (Irregular Plural)

• child   = children
• ox   = oxen
• brother = brethren

Rule:3 oo = ee (Irregular Plural)

• foot   = feet
• goose = geese
• tooth   = teeth

Exceptions:

• book   = books
• hook   = hooks
• roof   = roofs
• room  = rooms

Rule:4 …ouse  = …ice(Irregular Plural)

• louse  = lice
• mouse = mice

Others

• blouse = blouses
• house = houses

Rule:5 …um/on  = …a(Irregular Plural)

• automaton = automata
• bacterium = bacteria
• criterion = criteria
• curriculum = curricula
• datum = data
• erratum = errata
• medium = media
• ovum  = ova
• phenomenon= phenomena
• phylum = phyla

Rule:6 …a  = …ae(Irregular Plural)

• alga   = algae
• alumna = alumnae
• amoeba = amoebae
• antenna = antennae
• formula = formulae
• larva   = larvae
• nebula = nebulae
• vertebra = vertebrae
• vita   = vitae

Rule:7 …us  = …i(Irregular Plural)

• alumnus = alumni
• bacillus = bacilli
• cactus = cacti
• focus  = foci
• fungus = fungi
• nucleus = nuclei
• octopus = octopi
• radius = radii
• stimulus = stimuli
• syllabus = syllabi
• terminus = termini

Rule:8 …us  = …a(Irregular Plural)

• corpus = corpora
• genus = genera

Rule:9 …i(s)  = …e(s) (Irregular Plural)

• analysis = analyses
• axis   = axes
• basis  = bases
• crisis  = crises
• diagnosis = diagnoses
• ellipses = ellipsis
• hypothesis = hypothesis
• oasis  = oases
• parenthesis= parentheses
• synopsis = synopses
• thesis = theses

Rule:10 …e/Ix  = …ices(Irregular Plural)

• apex   = apices
• appendix = appendices
• codex = codices
• index  = indices
• matrix = matrices
• vortex = vortices

Rule:11 …eau  = …eaux(Irregular Plural)

• beau   = beaux
• bureau = bureaux
• chateau = chateaux
• plateau = plateaux
• tableau = tableaux

Rule:12 Singular-Plural same

• aircraft = aircraft
• cod   = cod
• deer   = deer
• fish   = fish
• means = means
• offspring = offspring
• series = series
• sheep = sheep
• species = species

Rule:13 Some other Italian Words in plural:

• concerto = concerti
• graffito = graffiti
• libretto = libretti
• tempo = tempi
• virtuoso = virtuosi

Rule:13 Some Hebrew Words in Plural:

• cherub = cherubim
• seraph = seraphim

Best  of  Luck!