/ Thesaurus / U Synonyms of unplayful Find synonyms for: Adjective1. unplayful (vs. playful), serious, soberusage: completely lacking in playfulnessWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ablution Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language