/ Thesaurus / H Synonyms of heat sink Find synonyms for: Noun1. heat sink, conductor, sinkusage: a metal conductor specially designed to conduct (and radiate) heatWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language