When expressing gratitude or acknowledging a particular feeling or emotion, one might use the phrase "am sensible of." However, there are several synonyms that could be used instead to convey the same sentiment. One such synonym is "appreciate," which implies a deeper level of understanding and recognition. "Acknowledge" is another synonym that can be used to show an understanding or recognition of something. "Realize" can also be used in this context, implying a newfound understanding and awareness. Other options include "comprehend," "grasp," and "perceive." These synonyms can help add depth and nuance to one's expression of gratitude or acknowledgement.