/ Thesaurus / O Synonyms of oestriol Find synonyms for: Noun1. estriol, oestriol, estrogen, oestrogenusage: a naturally occurring estrogenic hormone; a synthetic form is used to treat estrogen deficiencyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language