Synonyms of suspicious

suspicious

adjective

sə-ˈspi-shəs 

1

as in questionable

giving good reason for being doubted, questioned, or challenged

suspicious claims of being the rightful owner of the property

Synonyms & Similar Words

• questionable
• dubious
• disputable
• suspect
• doubtful
• problematic
• debatable
• fishy
• ambiguous
• shaky
• alleged
• shady
• equivocal
• queer
• unclear
• dodgy
• dubitable
• doubtable
• unlikely
• uncertain
• weak
• supposed
• improbable
• undetermined
• moot
• undecided
• so-called
• flimsy
• open
• far-fetched

Antonyms & Near Antonyms

• certain
• sure
• indisputable
• unquestionable
• unproblematic
• undeniable
• incontestable
• indubitable
• undoubted
• decisive
• obvious
• questionless
• definitive
• positive
• clear
• hands-down
• open-and-shut

2

as in skeptical

inclined to doubt or question claims

suspicious of any menu dish having a name she can't pronounce

Synonyms & Similar Words

• skeptical
• cautious
• careful
• incredulous
• wary
• questioning
• distrustful
• mistrustful
• doubting
• paranoid
• disbelieving
• negativistic
• unbelieving
• cynical
• suspecting
• show-me
• curious
• unsure
• watchful
• puzzled
• leery
• quizzical
• inquisitive
• experienced
• critical
• guarded
• uncertain
• hesitant
• unconvinced
• nosy
• worldly
• sophisticated
• undetermined
• knowing
• gun-shy
• undecided
• worldly-wise
• inquiring
• unsettled
• snoopy

Antonyms & Near Antonyms

• uncritical
• credulous
• gullible
• trusting
• trustful
• naive
• unsophisticated
• certain
• unquestioning
• innocent
• green
• positive
• simple
• sure
• confident
• ingenuous
• unknowing
• unworldly
• wide-eyed
• simpleminded
• inexperienced
• impractical
• idealistic
• raw
• childlike
• callow
• unsuspicious
• careless
• unsuspecting
• deceived
• heedless
• unwary
• duped
• tricked
• beguiled
• gulled

3

as in unsure

not feeling sure about the truth, wisdom, or trustworthiness of someone or something

you should be very suspicious of those telephone calls from people telling you that you're the winner of a contest you never entered

Synonyms & Similar Words

• unsure
• skeptical
• uncertain
• doubtful
• dubious
• unsettled
• distrustful
• mistrustful
• unconvinced
• undecided
• on the fence
• hesitant
• ambivalent
• hinky
• conflicted
• trustless
• insecure
• equivocal
• diffident
• irresolute
• indecisive
• wavering
• halting
• vacillating

Antonyms & Near Antonyms

• certain
• positive
• sure
• convinced
• confident
• assured
• sanguine
• decisive
• determined
• self-assured
• resolute

Example Sentences

Recent Examples of suspicious

Officers determined the death was suspicious and arrested Sisneros. — Meg Wingerter, Denver Post, 13 July 2026

On Friday, during a press conference discussing the latest on Wells’ suspicious death, attorney Ben Crump announced that Tyler Perry had agreed to pay the family’s funeral costs, while Colin Kaepernick planned to pay for an independent autopsy. — Michael Schneider, Variety, 11 July 2026

In that model, one agent might hire another to generate a market report, clean a dataset, design an ad variation, or monitor a wallet for suspicious activity. — Christer Holloman, Forbes.com, 10 July 2026

Robinson turned himself in the following night after a family member became suspicious and contacted authorities, PEOPLE previously reported. — Bethany Brown, PEOPLE, 10 July 2026