/ Thesaurus / F Synonyms of family spheniscidae Find synonyms for: Noun1. Spheniscidae, family Spheniscidae, bird familyusage: comprising all existing penguinsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language