Pancreas rhymes with:
aquarius, curious, deleterious, delirious, demetrius, denarius, dimitrius, dimitrius', furious, glorious, gregarious, hilarious, illustrious, imperious, industrious, inglorious, injurious, laborious, lugubrious, marius, meritorious, murias, mysterious, nefarious, notorious, penurious, precarious, serious, spurious, stradivarius, tavoulareas, various, vicarious, victorious, vitreous