Ultrasoft refers to something that is extremely soft, gentle or delicate, thus its antonyms are words that describe things that are opposite of that. Some antonyms for ultrasoft can include hard, rough, jagged, tough or harsh. These words signify roughness, coarseness, and firmness, thereby opposite to what ultrasoft represents. Other antonyms for ultrasoft could include firm, unyielding, rigid, rough-edged, and scratchy. Ultrasoft is an adjective that is often used to describe surfaces, fabrics or materials that are gentle to touch. The antonyms to ultrasoft highlight the differences in textures and physical properties of materials, thus providing an interesting way to use language to express contrasting qualities.