/ Thesaurus / I Synonyms of instantaneous sound pressure Find synonyms for: Noun1. sound pressure, instantaneous sound pressure, pressure, pressure level, force per unit areausage: the difference between the instantaneous pressure at a point in a sound field and the average pressure at that pointWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language