Torminous is an adjective used to describe extreme pain and discomfort in the stomach due to digestive issues such as cramps or bloating. There are several synonyms that can be used to describe this particular sensation, including agonizing, excruciating, tormenting, torturous, and harrowing. Other synonyms for torminous could include distressing, uncomfortable, troubling, or unease. These words can be used interchangeably to convey a similar sense of discomfort and pain in the stomach or digestive system. It is important to note that these words should be used carefully, as there can be varying degrees of pain and sensitivity for individuals experiencing digestive discomfort.