Moss and mousse may share a root — both describe soft, airy, cushiony textures, one in the forest and one on your dessert plate.
A light, creamy dessert made with whipped egg whites or cream, or a foamy preparation used on hair.
From French mousse meaning foam or froth, from Old French mosse meaning moss, from Frankish *mosa or Late Latin mulsa meaning mead or hydromel Key roots: mousse (French: "foam, froth (possibly related to moss)").