The term "sphacelated" refers to tissue that is dead or decaying due to an injury or disease. Some synonyms for this word could include necrotic, gangrenous, or putrid. Necrotic tissues are dead and often blackened, while gangrenous tissue may be discolored and infected with bacteria. Putrid tissue refers to tissue that is rotting, and may emit a foul odor. Other synonyms could include decayed, decomposed, or mortified. All of these words suggest a state of deterioration or death in the affected tissue, and may apply to different types of medical conditions or injuries.