The word "ancientnesses" refers to the state of being old or ancient. Some possible antonyms for this word include modernity, newness, freshness, youthfulness, and novelty. These words suggest a sense of vitality, innovation, and contemporary relevance. Other antonyms for "ancientnesses" might include timeliness, currency, topicality, and timeliness, which emphasize the importance of being up-to-date and relevant in the context of current events or trends. Overall, the antonyms for "ancientnesses" suggest a range of positive qualities associated with progress, growth, and change, which contrast with the more static and traditional connotations of the original term.