para·noia 
/ˌperəˈnojə/ noun
/ˌperəˈnojə/ noun [noncount] 1 medical : a serious mental illness that causes you to falsely believe that other people are trying to harm you
▪ She was diagnosed with delusional paranoia. 2 : an unreasonable feeling that people are trying to harm you, do not like you, etc.
▪ I had to admit that my fears were just paranoia.
▪ She was diagnosed with delusional paranoia.
▪ I had to admit that my fears were just paranoia.
