Hadst sensation is a phrase that refers to the experience of having a feeling or sensation. Synonyms for this phrase could include the words felt, sensed, perceived, experienced, or noticed. These words all describe the act of being aware of something through one's senses, whether it be touch, taste, smell, sight, or sound. Other possible synonyms for hadst sensation might include phrases like knowing, understanding, recognizing, or realizing, which all suggest a deeper level of awareness or insight. Ultimately, the choice of synonym will depend on the context in which the phrase is being used and the specific nuances of meaning that are intended.