To remember them, you can learn this sentence by heart « Viens mon petit chousur mes genoux, ne fais pas joujouavec mes bijoux, jette plutôt des caillouxà ce vieux hibouplein de poux. Note that this rule affects the spelling only: both endings -el and -elle are pronounced identically. In the spelling, these adjectives follow a rule slightly similar to French adjectives ending in -et : Adjectives ending in -el change this ending to -elle in the feminine. To remember them, you need to learn them by heart.- Bijou -> bijoux- Caillou -> cailloux- Chou -> choux- Genou -> genoux- Hibou -> hiboux- Joujou -> joujoux- Pou -> poux For nouns and adjectives ending in -eau, -au, -eu, we add an -x to the plural forms. French has a number of adjectives ending in -el. French - 402,324 words - based on ODS, LOfficiel du Scrabble, it is used in the World Scrabble Championships in French. Although most of the singular nouns ending with -ou take an -s in their plural form, a few exceptions exist.Ex: un cheval (singular) -> des chevaux (plural) In this case, you will need to put -aux to make the word plural. The same rule applies with the nouns ending with -al.However, the singular nouns ending in -au require an -x to turn plural.Ex: un cadeau (singular) -> des cadeaux (plural).7 French nouns ending in -ou that take -x in the plural form. Ex: un ordinateur (singular) -> des ordinateur s (plural) In French, most nouns ending in -ou take an -s in the plural form, but for 7 exceptions that take an -x. Most of the time, turning a noun from singular to plural is easy, and you will only need to add a -s at the end of the word.Depending on the types of nouns, different endings apply.