In English, regular nouns make their plural by adding -s (or -es, if they end in s/z sounds).
Irregular nouns make their plurals in other ways. Some examples:
Regular:
dog - dogs
cat - cats
horse - horses
bus - buses
Irregular:
man - men
mouse - mice
goose - geese
sheep - sheep
It is irregular.
Pentagons can be regular or irregular.
It is irregular.
A pentagon can be regular or irregular.
It is an irregular polygon.
Regular
A regular noun forms the plural by adding an 's' or an 'es' to the end of the word. Nouns that form the plural in some other way are called irregular plural nouns. Examples of regular plural nouns: apple, apples church, churches friend, friends Examples of irregular plural nouns are: child, children medium, media tooth, teeth
An irregular noun is a noun (object, thing) which isn't pluralised simply by adding an s (or -es which is also common) For instance, regular nouns are house/houses, table/tables, dish/dishes. Irregular nouns are sheep/sheep, child/children, foot/feet, formula/formulae.
Yes, nouns that are made plural b adding 's' or 'es' are called regular nouns; nouns made plural by some other form are called irregular nouns.
details on hidden morphemes in irregular nouns and verbs
The term for words that are the same in both singular and plural forms is "unchanged plural." Examples include "sheep," "deer," and "fish."
It is irregular.
Nouns that are made plural by adding an 's', 'es', or 'ies' are called regular plurals; nouns that from the plural by another means are called irregular plurals. Some examples of irregular plural common nouns are:singular / pluralman / menwoman / womenchild / childrenperson / peoplemouse / micegoose / geeseox / oxenfoot / feettooth / teethcactus / cactidatum / datamedium / media
regular or irregular
Pentagons can be regular or irregular.
The word 'children' is an irregular plural noun for the singular 'child'. There are also irregular possessive nouns such as Texas's flag or Claus's car. Both are forms of irregular nouns.
It is irregular.