| Singular | Plural | % Correct |
|---|---|---|
| Sheep | Sheep | 98%
|
| Fish | Fish | 94%
|
| Mouse | Mice | 94%
|
| Goose | Geese | 93%
|
| House | Houses | 93%
|
| Wish | Wishes | 93%
|
| Man | Men | 91%
|
| Van | Vans | 91%
|
| Moose | Moose | 90%
|
| Gold | Gold | 88%
|
| Tooth | Teeth | 88%
|
| Boot | Boots | 86%
|
| Foot | Feet | 85%
|
| Booth | Booths | 84%
|
| Mould | Moulds | 83%
|
| Cat | Cats | 80%
|
| Die | Dice | 76%
|
| Bus | Buses | 74%
|
| Box | Boxes | 70%
|
| Fungus | Fungi | 70%
|
| Ox | Oxen | 61%
|
| That | Those | 57%
|
| Nucleus | Nuclei | 53%
|
| Oasis | Oases | 46%
|
| Father-in-law | Fathers-in-law | 45%
|
| Loaf | Loaves | 39%
|
| Oaf | Oafs | 35%
|
| Atrium | Atria | 31%
|
| Son | Sons | 28%
|
| Person | People | 25%
|
| Suffix | Suffixes | 19%
|
| Appendix | Appendicies | 3%
|