All probable antonyms
prob·a·ble
P p adj probable
- implausible — not plausible; not having the appearance of truth or credibility: an implausible alibi.
- improbable — not probable; unlikely to be true or to happen: Rain is improbable tonight.
- inconceivable — not conceivable; unimaginable; unthinkable.
- unbelievable — too dubious or improbable to be believed: an unbelievable excuse.
- unlikely — not likely to be or occur; improbable; marked by doubt.
- impossible — not possible; unable to be, exist, happen, etc.
- unreasonable — not reasonable or rational; acting at variance with or contrary to reason; not guided by reason or sound judgment; irrational: an unreasonable person.