The word "more omnifarious" implies a wide variety or diversity. Therefore, its antonyms should have the opposite meaning, indicating uniformity or sameness. Some antonyms for "more omnifarious" can include monotonous, identical, homogeneous, narrow, single-minded, and single-focused. These words indicate a lack of variety or uniformity in thought, action, or style. Using antonyms for "more omnifarious" can be useful in expressing a specific desired effect. For example, in a context where too much variation is detrimental to the outcome, one might use "monotonous" instead of "more omnifarious" to convey the desired meaning.