This category lists English nouns whose plural is formed irregularly with respect to spelling. For the sake of this category, a noun has aregular plural if it:

• is a symbol or letter and forms its plural by adding-s or-’s
• is acommon noun ending in a consonant +y and forms its plural by replacing the-y with-ies
• ends in a sibilant (one of[s],[ʃ],[z],[ʒ]) and has plural ending-es
• does not fall under any of the three cases above and forms its plural by adding-s

Thus this category consists of nouns that don't satisfy any of the above.

For the plural forms themselves seeCategory:English irregular plurals.

• English irregular nouns