Rational and...?
Irrational
Friendly and...?
Unfriendly
Healthy and...?
Unhealthy
Helpful and...?
Unhelpful
Honest and...?
Dishonest
Possible and...?
Impossible
Employed and...?
Unemployed
Reliable and...?
Unreliable
Successful and...?
Unsuccessful
Correct and...?
Incorrect
Responsible and...?
Irresponsable
Happy and...?
Unhappy
Obedient and...?
Disobedient
Considerate and...?
Inconsiderate
Patient and...?
Impatient
Sure and...?
Unsure