Dimension rhymes with:
mention, apprehension, ascension, attention, comprehension, condescension, contention, convention, detention, dissension, extension, gentian, henschen, hypertension, hypotension, invention, laurentian, mention, misapprehension, pension, pretension, prevention, reinvention, retention, suspension, tension
Dimension sounds like:
damson, dancin', danskin, danson, denison, denizen, dennison, denshin, denson, dingham, dingman, dionysian, domeniconi, dominican, dominicana, donegan, dongen, dongmei, donigan, dunagan, duncan, dunegan, dungan, dungeon, dunigan, dunkin, dunkin', dunnagan, dunnigan, dunson, dyansen, dynamism, dynascan