Idaho rhymes with:
arapaho, arapahoe, donahoe, navajo, arapaho, arapahoe, backhoe, donahoe, freakshow, greenhoe, ivanhoe, navajo, prudhoe
Idaho sounds like:
i'd, id, ida, ide, idea, idette, idiot, ido, ihde, iida, iodide, iota, iott, it, it'd, it-wit, ita, ito, itoh, itty, iwata, iwate