The word "un-diversified" indicates a lack of variety or diversity. Some antonyms for this word could be "diverse," "varied," "multifaceted," "heterogeneous," or "eclectic." These words imply a range of different perspectives, experiences, and characteristics. "Diverse" and "varied" suggest an assortment of options or choices, while "multifaceted" or "heterogeneous" describe a multifarious array of different elements. On the other hand, "eclectic" refers to a diverse collection of items, often of wide-ranging styles or sources. Opposites of "un-diversified" such as these convey the importance of embracing and valuing diversity in all its forms.