Synonyms for Paperback (same or very similar meaning)
WordNet sense 1 (a book with paper covers):
softback, soft-cover, paperback book, paper-back book, softback book, soft-cover bookWordNet sense 2 ((of books) having a flexible binding):
paperbackedWordNet sense 3 (secured with a cover or binding; often used as a combining form):
boundFrom the ODE community, based on WordNetadd/edit