/ Thesaurus / N Synonyms of national park service Find synonyms for: Noun1. National Park Service, agency, federal agency, government agency, bureau, office, authorityusage: an agency of the Interior Department responsible for the national parksWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language