The term perceptor refers to a person or thing that perceives or understands things in a particular way. Here are some synonyms for this word: 1. Observer: A person who notices or watches something closely. 2. Senser: A person who senses or feels something. 3. Cognizer: A person who comprehends or recognizes something. 4. Percipient: A person who has a keen insight or understanding. 5. Discerner: A person who discerns or distinguishes something. 6. Intuitive: A person who has an intuitive understanding of things. 7. Connoisseur: A person who is an expert and knows the nuances of a particular field. 8. Knower: A person who has knowledge of something. These synonyms can be used interchangeably and enhance the vocabulary of the material being written or spoken.