One fox; two ...
foxes
One boy; two ...
boys
One cherry; two ...
cherries
One half; two ...
halves
One wolf; two ...
wolves
One safe; two ...
safes
One proof; two ...
proofs
One handkerchief; two ...
handkerchiefs
One cliff; two ...
cliffs
One dog; two ...
dogs
One city; two ...
cities
One video; two ...
videos
One roof; two ...
roofs
One hippo; two ...
hippos
One potato; two ...
potatoes
One baby; two ...
babies
One bush; two ...
bushes
One volcano; two ...
volcanoes
One knife; two ...
knives
One wife; two ...
wives
One table; two ...
tables
One toy; two ...
toys
One radio; two ...
radios
One tomato; two ...
tomatoes
One piano; two ...
pianos
One photo; two ...
photos
One leaf; two ...
leaves
One chief; two ...
chiefs
One zoo; two ...
zoos
One day; two ...
days