- Contingent: (adj) Conditional
- Eventuality: (n) A possibility
- Implausible: (adj) Unlikely
- In vain: (adv) With out success
- Inconceivable: (adj) Impossible to grasp fully
- Perchance: (adv) Perhaps
- Preposterous: (adj) Absurd
- Proclivity: (n) An inclination
- Prone: (adj) Likely to do
- Theoretical: (adj) Unproven