Viduity is a rarely used word which means "the state or condition of being a widow". While synonyms for this specific word may be scarce, there are several words that can be used instead to convey the same meaning. These include widowhood, bereavement, and singlehood. Widowhood means the state of being a widow, while bereavement refers to the state of being deprived of something or someone, often by death. Meanwhile, singlehood pertains to the state of being unmarried or unattached. While it's always good to expand one's vocabulary and use the most accurate word possible, using any of these synonyms can help avoid confusion among readers or listeners.