/ Thesaurus / U Synonyms of uncommonness Find synonyms for: Noun1. uncommonness, extraordinarinessusage: extraordinariness as a consequence of being marked by an uncommon or superlative quality2. uncommonness, extraordinarinessusage: extraordinariness as a consequence of being rare and seldom encounteredWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language