Langseth rhymes with:
aalseth, aalseth, chenoweth, chynoweth, colebreath, gilreath, giveth, hedgepeth, lisabeth, lizabeth, longstreth, sineath, wyeth
Langseth sounds like:
lamaist, lanai-city, lancet, lancit, lanctot, langguth, languid, languished, lanzet, launched, leanest, length, lengthy, leninist, linguist, linked, linquist, linscott, linseed, lionized, longed, longest, longitude, longshot, longuet, longwood, lunched, lunged, lynched