/ Thesaurus / C Synonyms of crux australis Find synonyms for: Noun1. Southern Cross, Crux, Crux Australisusage: a small conspicuous constellation in the southern hemisphere in the Milky Way near CentaurusWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language