Insensible of can be replaced with a variety of synonyms that convey a similar meaning. For instance, words such as unaware, ignorant, oblivious, and unacquainted can all be used as alternatives to insensible of. Other synonyms that come to mind include unconscious, insensitive, and unfeeling. Each of these words is useful in different situations, depending on what you wish to communicate. For example, "unconscious" implies that one is not aware of something due to a lack of consciousness, while "insensitive" suggests that one is not affected emotionally or physically by something. Thus, when looking for a suitable synonym for insensible of, it is essential to consider the context in which it will be used.