The word "un-gainlinesses" refers to a lack of grace or elegance in movement or appearance. Some synonyms for this term include awkwardness, clumsiness, ineptness, ungainliness, and ponderousness. Other similar words that can be used in place of "un-gainlinesses" include stiffness, gaucheness, gawkiness, maladroitness, and inelegance. These words can be used to describe anything from a person's physical movement to the way in which they speak or act. By using these synonyms, writers and speakers can add variety and nuance to their language, making it more engaging and interesting for their audience.