The curious French word for peanuts, cacahuètes (also spelled cacahouètes), is derived from the Nahuatl (the most spoken indigenous language in Mexico).
Peanuts are also commonly known as arachides, although arachide is the proper word for the plant and the whole peanut.
arachides en coques grillées: peanuts roasted in their shell
arachides décortiquées: shelled peanuts
beurre d'arachide or pâte d’arachide: peanut butter (Canada)
beurre de cacahuète or pâte de cacahuètes: peanut butter (Europe)
cacahuètes de comptoir: salted grilled peanuts with the skins on, ‘bar-style’
cacahuètes feuilletées: peanut-shaped candies from Morangis, sprinkled with roasted peanut chips
cacahuètes salées: salted peanuts
crémeuse: creamy (peanut butter)
croquante: crunchy (peanut butter)
huile d'arachide: peanut oil
nougatine aux cacahuètes: peanut brittle
Image by Jack Dykinga, USDA ARS, Creative Commons License