The antonyms for the phrase "most dead level" would be words that signify the opposite of the said phrase. The word "most" implies an extreme, so the antonyms would be words that suggest a lower degree of flatness. Words like uneven, sloping, slanted, hilly, and tilted are antonyms to "most dead level." These words connote an uneven or inclined surface, contradicting the meaning of "dead level." Another set of antonyms for "most dead level" would be words that suggest an extraordinary level or height. Words such as towering, soaring, sky-high, elevated, and lofty all signify a significant degree of height, contrasting the term's connotation.