/ Thesaurus / P Synonyms of pku test Find synonyms for: Noun1. PKU test, diagnostic test, diagnostic assayusage: a test of newborn infants for phenylketonuriaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language