Hbox rhymes with:
balks, balks, chalks, faulks, faux, fawkes, flummox, hawke's, hawkes, hawks, laux, salk's, squawks, stalks, talk's, talks, vaux, wachs, walks
Hbox sounds like:
habeas, habeck, habich, habig, habs, hafez, haffez, hafif's, hapag, hapke, hauppauge, havas, haves, havis, havoc, heaps, heaves, heavies, hibaaq, hibachi, hibbs, hippies, hippos, hipps, hips, hives, hoback, hobaugh, hobbes, hobbies, hobbs, hoboes, hobs, hoefs, hoffa's, hoofs, hoopes, hoops, hooves, hope's, hopes, hopke, hoppes, hopps, hops, hovious, hovis, hubbs, hubco, hubka, hubs, huebsch, huff's, huffs, huffy's, hypes, hypoxia