Dungeon rhymes with:
amerongen, engine, allergan, allergen, amerongen, antigen, belgian, bijan, bludgeon, burgeon, cajun, carcinogen, collegian, contagion, dajun, detjen, dodgen, dudgeon, engine, estrogen, evjen, georgian, gudgeon, halogen, hodgen, hydrogen, imagine, karajan, legion, margin, nadjen, neurosurgeon, nitrogen, norwegian, oncogen, origin, oxygen, pathogen, petitjean, pigeon, pridgen, rathjen, region, religion, smidgen, sturgeon, sundararajan, surgeon, tejan, tietjen, trajan, trojan, trudgen, virgen
Dungeon sounds like:
damson, dancin', danskin, danson, denison, denizen, dennison, denshin, denson, dimension, dingham, dingman, dionysian, domeniconi, dominican, dominicana, donegan, dongen, dongmei, donigan, dunagan, duncan, dunegan, dungan, dunigan, dunkin, dunkin', dunnagan, dunnigan, dunson, dyansen, dynamism, dynascan