suspect vb
1 distrust, doubt, harbour suspicions about, have one's doubts about, mistrust, smell a rat (informal)
2 believe, conclude, conjecture, consider, fancy, feel, guess, have a sneaking suspicion, hazard a guess, speculate, suppose, surmise, think probable adj
3 dodgy (Brit., Austral., & N.Z. informal) doubtful, dubious, fishy (informal) iffy (informal) open to suspicion, questionable vb accept, be certain, be confident of, believe, buy (slang) have faith in, know, swallow (informal) think innocent, trust adj above suspicion, innocent, reliable, straightforward, trustworthy, trusty