Compounds of 疑心

• 疑心
  (n) doubt
  suspicion
  fear
  apprehension
  (P)
• 懐疑心
  (n) skepticism
  scepticism
  doubt
• 猜疑心
  (n) suspicion (of others)
  jealousy
• 疑心暗鬼
  (n) Suspicion will raise bogies
  Once you suspect something, everything else will look suspicious