/ Thesaurus / S Synonyms of sonic delay line Find synonyms for: Noun1. acoustic delay line, sonic delay line, delay lineusage: a delay line based on the time of propagation of sound wavesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language