##  [Irregular plural nouns](/en/quiz/jeu-quiz-irregular-plural-nouns-eng)

Normally, we pluralize a noun by adding a final **s** or **es** to the singular form. But some nouns have irregular plurals, which just have to be memorized. Try our quiz to see whether you've been pluralizing irregular nouns correctly.

1. Canada ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) fly in a distinct V-formation.geese

gooses

geeses

2. ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) are always used in pairs.Parenthesis

Parentheses

Parenthesi

3. Bull ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) have antlers that can span up to 1.5 metres.moose

mooses

meese

4. When you roll ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif), you're rolling more than one game piece.die

dices

dice

5. The Royal Canadian Mint stopped producing ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) in 2013.pennys

pennies

penny

6. Peng spent his entire weekend watching his two favourite TV ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif).seryes

serie

series

7. When ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) are born, they weigh about 80 lbs.calfes

calfs

calves

8. ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) are wild ox that live and migrate in herds.Bisones

Bisons

Bison

9. The teacher marked their ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) with a red pen.quizzes

quizes

quizs

10. The ![Placeholder for the answer](/sites/default/files/underscore_15_black-wet.gif) were lined up on the flight deck.aircrafts

aircraftes

aircraft