Constar rhymes with:
canstar, genstar, minstar, sunstar, acustar, aerostar, amstar, apstar, canstar, cellstar, crestar, earthstar, eurostar, firstar, flagstar, genstar, globalstar, goldstar, incstar, lodestar, minstar, morningstar, navistar, navstar, norstar, northstar, oberstar, primestar, sunstar, telstar, texstar, torstar, tristar, windstar, wordstar
Constar sounds like:
canister, cannister, cannistraro, canstar, chemistry, communicator, conjecture, connecter, connector, consider, construe