Fribourg rhymes with:
heisbourg, luxembourg, richbourg, strasbourg, heisbourg, luxembourg, richbourg, strasbourg, barg, bjorge, borg, bosarge, bourg, bridesburg, cherbourg, cyborg, forgue, garg, georg, heisbourg, joerg, karg, kharg, labarge, laforge, lundborg, luxembourg, mchargue, meharg, morgue, npr.org, nyborg, org, richbourg, robarge, sorg, strasbourg, trelleborg, willenborg, yekaterinburg
Fribourg sounds like:
firebrick, forebears, freberg, freeberg, freeberg's, freeburg, freiberg, friberg, froberg