The term "gross darkness" refers to an extremely dark and bleak situation or state of being. This phrase can be used to describe many different scenarios, from emotional turmoil to physical darkness. Some possible synonyms for "gross darkness" include profound darkness, deep shadow, utter blackness, impenetrable gloom, and pitch-black obscurity. These terms all convey a sense of the extreme and the overwhelming, reflecting the foreboding and oppressive nature of the situation being described. When seeking to convey the utmost in darkness and despair, these synonyms for "gross darkness" can be powerful tools in the writer's arsenal.