/ Thesaurus / R Synonyms of rus. Find synonyms for: Noun1. Rususage: the medieval Russian state established by Scandinavian traders in the 9th century; the capital was first in Novgorod and then in KievWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language