Nouns

(n)intuition, hunch, suspicionan impression that something might be the case“he had an intuition that something had gone wrong”
(n)misgiving, mistrust, distrust, suspiciondoubt about someone's honesty
(n)suspicionthe state of being suspected“he tried to shield me from suspicion”
(n)suspicion, suspiciousnessbeing of a suspicious nature“his suspiciousness destroyed his marriage”