As nouns the difference between morphine and tramadol

is that morphine is a crystalline alkaloid (7,8-didehydro-4,5-epoxy-17-methyl-morphinan-3,6-diol), extracted from opium, the salts of which are soluble in water and are used as analgesics, anaesthetics and sedatives; it is one of a group of morphine alkaloids while tramadol is a synthetic analgesic opiate used for the relief of pain.