More monster can be described as a frightening creature that is bigger or scarier than its counterpart. Antonyms for more monster would be words that can describe a smaller or less intimidating creature. Some possible options might include "less monster," "smaller creature," or "gentle being." Conversely, antonyms for "monster" itself might include words like "angel," "innocent," or "saintly." These antonyms can help to balance out the more negative connotations of the original word, suggesting a world in which there are both fearsome beasts and innocent creatures coexisting. Ultimately, the choice of antonym for "more monster" will depend on the specific context and intended meaning of the sentence or phrase.