The word "more supercolossal" implies something of immense and phenomenal proportions. However, its antonyms convey the opposite meaning - something insignificant, small, and tiny. Words like minuscule, microscopic, puny, and insignificant are antonyms that can be used to denote the opposite of supercolossal. These words can be used to describe something that is small in size, unimportant, and has little impact. Additionally, terms like trivial, paltry, and inconsequential can also be used to convey a similar meaning. The use of these antonyms can create a vivid contrast between something colossal and something insignificant, highlighting the enormity of whatever is being described as "more supercolossal.