/ Thesaurus / P Synonyms of point of periapsis Find synonyms for: Noun1. periapsis, point of periapsis, celestial pointusage: (astronomy) the point in an orbit closest to the body being orbitedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language