Synonyms of the word

suspicious

• adj. Arousing suspicion.
• adj. Distrustful or tending to suspect.
• adj. Expressing suspicion.

distrustful

• adj. Marked by distrust; doubtful; suspicious.
• adj. Causing or giving rise to distrust.

fishy

• n. (childish) diminutive of fish.
• adj. Of, from, or similar to fish.
• adj. Suspicious; inspiring doubt.
• adj. (LGBT slang) Of drag queens: appearing feminine.

funny

• adj. Amusing; humorous; comical.
• adj. Strange or unusual, often implying unpleasant.
• n. (humorous) A joke.
• n. (humorous) A comic strip.
• n. (Britain) A narrow boat for sculling.

leery

• adj. Cautious, hesitant, or nervous about something; having reservations or concerns.

mistrustful

• adj. Having or causing mistrust, suspicions, or forebodings.

questionable

• adj. (obsolete) Inviting questions; inviting inquiry.
• adj. Problematic; open to doubt or challenge.
• adj. Of dubious respectability or morality.

shady

• adj. Abounding in shades.
• adj. Causing shade.
• adj. Overspread with shade; sheltered from the glare of light or sultry heat.
• adj. (informal) Not trustworthy; disreputable.
• adj. (Britain, slang) Mean, cruel.

suspect

• v. (transitive) To imagine or suppose (something) to be true, or to exist, without proof.
• v. (transitive) To distrust or have doubts about (something or someone).
• v. (transitive) To believe (someone) to be guilty.
• v. (intransitive) To have suspicion.
• v. (transitive, obsolete) To look up to; to respect.
• n. A person who is suspected of something, in particular of committing a crime.
• adj. Viewed with suspicion; suspected.
• adj. (nonstandard) Viewing with suspicion; suspecting.

untrusting

• adj. Without trust; not inclined to trust.

wary

• adj. Cautious of danger; carefully watching and guarding against deception, artifices, and dangers; timorously…
• adj. Characterized by caution; guarded; careful.