For physical sensations:
* Sense: "I can sense the heat radiating from the fire."
* Perceive: "I perceive a slight vibration in the floor."
* Experience: "I experienced a sudden jolt of pain."
* Detect: "I detected a change in temperature."
For emotional states:
* Experience: "I experienced a deep sense of sadness."
* Be aware of: "I am aware of my own anxiety."
* Have: "I have a feeling of dread."
* Believe: "I feel that this project will be successful."
For opinions:
* Believe: "I feel strongly about this issue."
* Think: "I feel that this is the best solution."
* Consider: "I consider this to be a good opportunity."
* Be of the opinion: "I am of the opinion that we should proceed cautiously."
For tactile sensations:
* Touch: "I can feel the texture of the fabric."
* Handle: "I like to handle the delicate porcelain."
* Grasp: "I can feel the cool metal in my hand."
* Palpate: (medical) "The doctor palpatated my abdomen to check for any abnormalities."
For general sense:
* Discover: "I feel like I've finally discovered my purpose."
* Understand: "I feel like I understand the situation now."
* Be aware of: "I feel like something is wrong."
* Perceive: "I feel like I'm being watched."
The best synonym to use will depend on the specific context of your sentence.