plural of goose
geese
neutral form of manageress
manager
plural of flamingo
flamingos
plural of crisis
crises
neutral form of chairman
chair
plural of monarch
monarchs
singular of heroes
hero
singular of oases
oasis
plural of sheriff
sheriffs
plural of formula
formulae
plural of quay
quays
plural of mosquito
mosquitoes
singular of media
medium
singular of wharves
wharf
plural of quiz
quizzes