The word "putdownable" means a book, movie, or activity that someone can easily put down or stop doing, usually because it's not engaging or interesting. Its antonym, on the other hand, is "unputdownable," which describes something so captivating or exciting that one cannot stop doing or experiencing it. Some other antonyms for "putdownable" include "engaging," "gripping," "intriguing," "compelling," "fascinating," and "absorbing." These words describe something that captures one's attention and holds it throughout, making it difficult to stop doing or experiencing. Unlike "putdownable," these words evoke enthusiasm, interest, and excitement, making them the ideal ways to describe books, movies, or activities that people simply can't get enough of.