French Adjectives Ending in -al

French adjectives ending in -al follow a distinctive pattern: the masculine plural is formed with -aux rather than the regular -s: amical → amicaux, mondial → mondiaux, national → nationaux. A small number are exceptions and take a regular -s in the plural: banal → banals, fatal → fatals.

amical / amicale
amicaux / amicales
amicable
banal / banale
banals / banales
trite, unoriginal, mundane
commercial / commerciale
commerciaux / commerciales
commercial
fatal / fatale
fatals / fatales
fatal, deadly
final / finale
finals / finales
final, last
glacial / glaciale
glaciaux / glaciales
icy, glacial
génial / géniale
géniaux / géniales
brilliant
idéal / idéale
idéaux / idéales
ideal
international / internationale
internationaux / internationales
international
local / locale
locaux / locales
local
matinal / matinale
matinaux / matinales
early-rising, morning
national / nationale
nationaux / nationales
national
normal / normale
normaux / normales
normal
original / originale
originaux / originales
original
partial / partiale
partiaux / partiales
biased, partial
principal / principale
principaux / principales
main
royal / royale
royaux / royales
royal
rural / rurale
ruraux / rurales
rural
spécial / spéciale
spéciaux / spéciales
special, specific