Here's what rhymes with heartsink.
think sink zinc sync thinke fink drink link pink shrink brink wink blink rethink stink chink kink mink rink slink bethink jink clink preshrink countersink interlink cufflink Words that almost rhyme with heartsink
sick thick silk sic sich hich vhich hick risk milk brick disk pick stick disc trick kick brisk chick lick tick nick prick slick tic wick dick flick pic whisk mic rick bisque frisk spic bilk mick shtick snick spik schtick quick click aspic crick handpick politic obelisk basilisk firebrick unpick dropkick lunatic buttermilk bailiwick nonstick bolshevik skinflick candlestick videodisk realpolitik