The word "unlikeness" refers to the quality or state of being dissimilar or unlike. Its antonyms refer to similarity or likeness. Synonyms for "unlikeness" include diversity, difference, dissimilarity, and variation. Antonyms for "unlikeness" include similarity, sameness, agreement, resemblance, and correspondence. These antonyms denote a degree of similarity or likeness between two or more objects or concepts. Synonyms and antonyms are useful for enriching one's vocabulary and improving one's writing or communication skills. By using synonyms and antonyms, one can avoid repetition, add variety to one's language, and express oneself more effectively.