Words That Rhyme With "Rectum" :

2 syllables:

beckon, cecum, decan, Deccan, dictum, jetton, lactam, nekton, pekan, plectrum, septum, sextan, sexton, spectrum, victim

3 syllables:

azactam, electrum, selectman, Tibetan

4 syllables:

mesorectum, tonsillectome