/ Thesaurus / F Synonyms of femtovolt Find synonyms for: Noun1. femtovolt, potential unitusage: a unit of potential equal to one quadrillionth of a volt (or one thousandth of a nanosecond)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language