* Logical: This directly opposes the meaning of "absurd" as illogical or nonsensical.
* Rational: Similar to "logical," this implies a clear and sensible approach.
* Sensible: This emphasizes practicality and good judgment.
* Reasonable: This suggests a fair and understandable perspective.
* Plausible: This implies something is believable or likely.
* Sane: This emphasizes mental soundness and rationality.
* Sound: This indicates good judgment and logic.
* Reasonable: This suggests something is fair and understandable.
The best antonym for "absurd" will depend on the specific situation and the nuance you want to express.