Featherinesses is a word used to describe the quality of being light and airy like a feather, and can be replaced with similar terms such as fluffiness, fuzziness or downiness. Other synonyms for featherinesses include softness, delicacy, and airiness, which are all great words to describe something with a light and gentle texture, like a fluffy pillow or a soft piece of fabric. Featherinesses can also be replaced with terms like lightness or weightlessness, which convey a sense of being free and unencumbered, like a feather floating through the air. Whatever synonym you choose, they all capture the essence of featherinesses and make for wonderful descriptions of objects that are light and airy.