* Formal: "The study found a high comorbidity between obesity and type 2 diabetes."
* Informal: "Her anxiety disorder is complicated by a comorbidity of depression."
* Medical: "The patient's comorbidities included heart disease and lung cancer, making surgery a high-risk procedure."
* Research: "The research team analyzed the comorbidity of chronic pain and sleep disorders in older adults."
Remember, "comorbidity" refers to the presence of two or more diseases or conditions in the same person.