In Arabic, there are two types of noun and adjective plural forms: sound (regular) plurals, and broken (irregular) plurals. Masculine sound plural nouns end in ون and feminine sound plural nouns end in ات.

Usually feminine inanimate nouns that end in ta marbuta take the feminine sound plural.

There are some important exceptions to this rule though.

There are also some masculine nouns, usually borrowed words, that take the feminine sound plural.

The masculine sound plural is never used with inanimate nouns.

Adjectives
Adjectives that modify masculine nouns end in ون, and adjectives that modify feminine nouns end in ات.

Irregular Plurals

Lots of irregular adjectives.

Irregular Plurals
Arabic has lots of irregular plurals- known as broken plurals. The plural form is expressed by changing the stem of the singular form.

men	رجال	man	رَجُلٌ
women	نِسوة	woman	امرأة

For people nouns that have both masculine and feminine forms, often the feminine plural is regular and the masculine plural irregular.

Following are the plural subject pronouns.

نحنُ is also used for dual 'we'. هؤلاء is the both the masculine and the feminine form of these.