/ Thesaurus / S Synonyms of sick leave Find synonyms for: Noun1. sick leave, leave, leave of absenceusage: a leave of absence from work because of illnessWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language