The term "lay person" refers to someone who is not trained or knowledgeable in a specific field or subject matter. Some synonyms for the word "lay person" include non-expert, amateur, novice, outsider, non-professional, and layman. These terms can be used to describe individuals who lack formal training or experience in a particular area, particularly in technical or specialized fields such as medicine, engineering, or law. In some cases, the word "lay person" may be considered slightly derogatory or dismissive, so using a synonym that is more neutral or positive can help to convey a more respectful tone.