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

Their snooping about doesn’t entirely sit well with the restless community that has some suspicious characters in it. — Randy Myers, Mercury News, 19 Aug. 2026

Days later, the family started receiving suspicious texts from her phone asking for money. — Darla Miles, ABC News, 19 Aug. 2026

The Greenville Police Department previously said that its preliminary investigation had not indicated signs of foul play or suspicious circumstances. — Angelique Brenes, PEOPLE, 18 Aug. 2026

Wheatland police learned of the threat early Tuesday and searched the exterior of the campus, finding nothing suspicious. — Darrell Smith, Sacbee.com, 18 Aug. 2026