morbid -- (suggesting an unhealthy mental state; "morbid interest in death"; "morbid curiosity")
ghoulish, morbid -- (suggesting the horror of death and decay; "morbid details")
diseased, morbid, pathologic, pathological -- (caused by or altered by or manifesting disease or pathology; "diseased tonsils"; "a morbid growth"; "pathologic tissue"; "pathological bodily processes")