Collector's rhymes with:
collectors, collectors', collectors, collectors', collectors, collectors', electors, lechters, reflectors, collectors, collectors', connectors, defectors, detectors, director's, directors, directors', electors, hector's, injectors, inspector's, inspectors, inspectors', lechters, objectors, projectors, protectors, reflectors, sector's, sectors, specter's, spektr's, vectors
Collector's sounds like:
cloisters, clusters, collectors, collectors'