Questionable' is an adjective used to describe something that is uncertain, DOUBTFUL, or SUSPICIOUS. 'DEBATABLE' (9 letters) is a synonym for 'questionable' and means that something is open to argument or discussion. 'BORDERLINE' (10 letters) is another word for 'questionable' and suggests that something is close to being unacceptable or wrong. 'SUS' (3 letters) is an abbreviation for 'SUSPICIOUS' and implies that something is not trustworthy. 'ARGUABLE' (8 letters) is similar to 'DEBATABLE' and means that something can be argued or disputed. 'DOUBTFUL' (8 letters) is another way of saying 'questionable' and suggests that something is unlikely or uncertain. 'MOOT' (4 letters) is a term used to describe something that is open to debate or discussion. 'FISHY' (5 letters) is an informal way of saying 'questionable' and implies that something is SUSPICIOUS or untrustworthy. 'PROBLEMATIC' (11 letters) is a synonym for 'questionable' and suggests that something is difficult or challenging. 'SUSPECT' (7 letters) is another word for 'questionable' and implies that something is not reliable or trustworthy. 'DUBIOUS' (7 letters) is a synonym for 'questionable' and means that something is uncertain or DOUBTFUL. 'IFFY' (4 letters) is an informal way of saying 'questionable' and implies that something is unreliable or uncertain. 'SHADY' (5 letters) is an informal way of saying 'questionable' and suggests that something is SUSPICIOUS or untrustworthy. 'SHAKY' (5 letters) is another way of saying 'questionable' and implies that something is uncertain or unreliable. 'UNSURE' (6 letters) is a synonym for 'questionable' and means that something is uncertain or DOUBTFUL. 'EQUIVOCAL' (9 letters) is another word for 'questionable' and suggests that something is open to interpretation or has multiple meanings.