Breadcrumb Home > Thesaurus > P Synonyms of psoas Find synonyms for: Noun1. psoas, skeletal muscle, striated muscleusage: either of two muscles of the abdomen and pelvis that flex the trunk and rotate the thighWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of psoas (Dictionary) ✖ Related Content Daily Word Quiz: legerdemain Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language