/ Thesaurus / S Synonyms of superhigh frequency Find synonyms for: Noun1. superhigh frequency, SHF, radio frequencyusage: 3 to 30 gigahertzWordNet 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