/ Thesaurus / L Synonyms of listlessness Find synonyms for: Noun1. languor, lassitude, listlessness, apathyusage: a feeling of lack of interest or energy2. listlessness, torpidity, torpidness, torpor, passivity, passivenessusage: inactivity resulting from lethargy and lack of vigor or energyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language