/ Thesaurus / H Synonyms of high frequency Find synonyms for: Noun1. high frequency, HF, radio frequencyusage: 3 to 30 megahertz2. high pitch, high frequency, pitchusage: a pitch that is perceived as above other pitchesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: respite Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language