Paranoid reaction is a psychological term that refers to a condition characterized by unfounded suspicions, mistrust, and fearfulness that are not based on reality. Synonyms for this term include paranoia, suspicion, distrust, anxiety, and fear. People who have a paranoid reaction may experience symptoms such as excessive vigilance, irrational thoughts, and delusions. They may also feel threatened or persecuted by others, even when there is no real evidence to support their beliefs. Other synonyms for paranoid reactions include paranoia disorder, persecutory delusion, feelings of persecution, and irrational fear. Ultimately, these synonyms can be used interchangeably to describe a condition that is characterized by excessive fear, anxiety, and suspicion.