Bismuth rhymes with:
behemoth, dartmouth, demuth, falmouth, fellmeth, mammoth, monmouth, niemuth, plymouth, portsmouth, samoth, warmoth, weymouth, wilmoth
Bismuth sounds like:
bachand, backend, backhand, backhanded, bagent, bagnato, basement, basnett, bazinet, beckoned, begnaud, besant, bessent, bissonette, bissonnette, bookend, booknote, booksmith