17. wolf
wolves
16. loaf
loaves
15. appendix
appendices
14. foot
feet
13. person
people
12. fish
fish
11. sheep
sheep
10. cactus
cacti
9. deer
deer
8. offspring
offspring
7. series
series
6. species
species
5. salmon
salmon
4. moose
moose
3. quiz
quizzes
2. aircraft
aircraft
