/ Thesaurus / S Synonyms of sickle cell Find synonyms for: Noun1. sickle cell, red blood cell, RBC, erythrocyteusage: an abnormal red blood cell that has a crescent shape and an abnormal form of hemoglobinWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language