Examples of simulfixes in English are generally considered irregularities, all of which left over from pluralization rules that existed before the Great Vowel Shift. They include:
- man → men, woman → women
- louse → lice, mouse → mice
- foot → feet, tooth → teeth
- "Simulfix". SIL Glossary of Linguistic Terms. 2015-12-03. Retrieved 2018-08-29.