/ Thesaurus / A Synonyms of autonomic nervous system Find synonyms for: Noun1. autonomic nervous system, ANS, neural structureusage: the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glandsWordNet 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