ˌpærəˈnɔɪək

Definitions

1. noun

a person who suffers from paranoia, often excessively suspicious and distrustful of others

“The paranoiac accused his neighbors of spying on him.”

2. adjective

given to or characterized by paranoia, excessively suspicious or distrustful

“The paranoiac behavior of the character in the novel was unsettling.”