Difference between Questionable and Suspicious

QUESTIONABLE vs SUSPICIOUS: ADJECTIVE

Able to be refuted
Open to doubt or challenge; problematic.
Not yet determined or specified.
Of dubious morality or respectability.
Admitting of being questioned; inviting, or seeming to invite, inquiry.
Liable to question; subject to be doubted or called in question; problematical; doubtful; suspicious.
Problematic; open to doubt or challenge
Of dubious respectability or morality
Subject to question

Openly distrustful and unwilling to confide
Arousing or apt to arouse suspicion; questionable.
Tending to suspect; distrustful.
Expressing suspicion.
Inclined to suspect; given or prone to suspicion; apt to imagine without proof.
Liable to suspicion; adapted to raise suspicion; giving reason to imagine ill; questionable.
Arousing suspicion.
Distrustful or tending to suspect.
Not as expected

Capable of being questioned or inquired of; inviting or seeming to invite inquiry or conversation.
Liable to question; suspicious; doubtful; uncertain; disputable: as, the deed is of questionable authority; his veracity is questionable.

Doubtful, dubious.
Synonyms Jealous.
Liable to cause suspicion; adapted to raise suspicion; questionable: as, suspicious innovations; a person met under suspicious circumstances.
Indicating suspicion, mistrust, or fear.
Inclined to suspect; apt to imagine without proof; entertaining suspicion or distrust; distrustful; mistrustful.

Supposed, Apocryphal, Deniable, Suspect, Refutable, Alleged, Equivocal, Suspicious, Fishy, Problematical, Shady, Problematic, Debatable, Doubtful, Dubious

Unusual, Suspected, Mysterious, Strange, Queer, Funny, Untrusting, Shady, Leery, Mistrustful, Questionable, Wary, Distrustful, Fishy, Suspect

Supposed, Apocryphal, Deniable, Suspect, Refutable, Alleged, Equivocal, Suspicious, Fishy, Problematical, Shady, Problematic, Debatable, Doubtful, Dubious

Unusual, Suspected, Mysterious, Strange, Queer, Funny, Untrusting, Shady, Leery, Mistrustful, Questionable, Wary, Distrustful, Fishy, Suspect

Histopathology should be considered to discern questionable lesions.
Implement procedures for follow up on questionable cases.
Any questionable purchases are reimbursed by the employees.
The value of determining rectal temperature is questionable.
Report: Steph Curry, Kevin Durant questionable tomorrow vs.
Might some of those restrictions be constitutionally questionable?
The evidence behind this dietary strategy is questionable.
Propose removing this verbiage as it is questionable whether this is relevant given the amount of information available and possibly ethically questionable.
Do report coupons you see that look questionable by sending any valuable information you have about where you saw or received a questionable coupon.
We have software on all our electronics that alerts each other if we go to questionable sites or search questionable content, etc.

Look for suspicious activity and review safety protocols.
Never click embedded links from suspicious text messages.
It made us suspicious of partisanship, it made us up suspicious of sectarian ideas.
Residents are encouraged to call dispatch to report suspicious activity and not call the office of the Neighborhood Watch Coordinator to report suspicious activity.
Two Arrested for Shoplifting at Home Depot in Manahawkin on Monday about a suspicious male and a suspicious female inside the Home Depot.
Suspicious Activity Detected Due to latest suspicious activity from your computer system, we have blocked your entry to http.
Suspicious Activity Information, Part II of the SAR provides a number of categories with different types of suspicious activity.
Act quickly on suspicious changes: Do not pay for a monitoring service unless you also commit to acting timely on notice of suspicious activity.
Registrants that rely on rigid formulas to define whether an order is suspicious may be failing to detect suspicious orders.
Suspicious behaviour: obligations to report suspicious considered suspicious.