+70 Irregular Plurals Nouns in English
| Singular | Plural |
| Trout | Trout |
| Genus | Genera |
| Focus | Foci |
| Person | People |
| Tooth | Teeth |
| Curriculum | Curricula |
| Mouse | Mice |
| Wife | Wives |
| Deer | Deer |
| Vita | Vitae |
| Quiz | Quizzes |
| Index | Indices |
| Datum | Data |
| Aircraft | Aircraft |
| Woman | Women |
| Leaf | Leaves |
| Fish | Fish |
| Sheep | Sheep |
| Singular | Plural |
| Goose | Geese |
| Tuna | Tuna |
| Ellipsis | Ellipses |
| Codex | Codies |
| Lavra | Lavrae |
| Erratum | Errata |
| Oasis | Oases |
| Ox | Oxen |
| Swine | Swine |
| Trout | Trout |
| Analysis | Analyses |
| Series | Series |
| Child | Children |
| Foot | feet |
| Nebula | Nebulae |
| Leaf | Leaves |
| Diagnosis | Diagnoses |
| Alumna | Alumnae |
