Cellstar rhymes with:
telstar, globalstar, telstar, acustar, aerostar, amstar, apstar, canstar, constar, 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
Cellstar sounds like:
calcaterra, callister, celestory, cloister, cluster, collector, collister