Serbs' rhymes with:
serb's, serbs, blurbs, curbs, disturbs, erbes, herb's, herbs, kerbs, perturbs, serb's, serbs, verbs, zirbes
Serbs' sounds like:
sacirbey's, sacrifice, sacrifices, sagraves, sarvis, scarface, scarfs, scarves, scrapbook, scrapbooks, scrapes, scraps, scribes, scripp's, scripps, seagraves, seagroves, searfoss, segraves, serb's, serbia's, serbias, serbs, serbska, serfass, serfs, serpas, serpico, servaas, servais, serves, service, service's, services, services', servico, servis, serviss, sharp's, sharpies, sharps, sharpy's, sheriff's, sheriffs, shreves, shrubs, skorupski, sorbus, sorovski, sorovski's, sorpasso, srpska, surbaugh, surf's, surface, surfaces, surpass, surpasses, survey's, surveys, survives, swarovski, syrups