Antonyms for suspicious

distrustful:

believable, thoughtless, undoubting, heedless, palpable, certain, confident, trustworthy, incautious, convinced, believing, unquestionable, trusting, innocent, trusty, sure, undoubted, uncareful, Indubious, inattentive, rash, careless.

doubtful, fishy:

definite, clear, secure.

noun:

heedless, clear, Questionless, indisputable, satisfied, definitive, self-assured, inexperienced, convinced, impractical, idealistic, obvious, undoubted, kindly, Gulled, indubitable, assured, naive, unquestioning, callow, positive, careless, sure, confident, undeniable, wide-eyed, contented, unproblematic, well-disposed, incontestable, credulous, hands down, sanguine, childlike, raw, open-and-shut, certain, beguiled, friendly.

Paraphrases for Suspicious:

• Adjective :
  alarming, alleged, ambiguous, anonymous, aware, awkward, bad, bizarre, careful, cautious, conspicuous, creepy, curious, daunting, dirty, disputed, disquieting, distressing, distrustful, disturbing, dodgy, doubtful, dubious, equivocal, fishy, freaky, impaired, in-doubt, mistrustful, murky, mysterious, obscure, obvious, odd, peculiar, presumed, presumptive, problematic, questionable, sceptical, shadowy, shady, skeptical, sketchy, strange, suspect, suspected, troubling, unambiguous, uncertain, uncertainty, unclear, unidentified, unknown, unlikely, unreliable, unsavoury, unsound, unsure, unusual, vague, wary, weird, worried, worrisome, worrying, wrong.
• Interjection :
  suspect.
• Noun, singular or mass :
  accused, assailant, PERP, subordinate, suggestive, suspect, suspected, UNSUB.
• Proper noun, singular :
  bad, doubtful, NITE, questionable, suspect, suspected, suspects, ugly, UNSUB.
• Verb, non-3rd person singular present :
  suspect.