Here are some other possible translations depending on the context:
* "Kakaiba" - strange, unusual
* "Hangal" - foolish, silly
* "Katawa-tawa" - laughable, ridiculous
* "Walang kabuluhan" - meaningless, pointless
For example, you could say:
* "Ang kwento ay walang katotohanan." - The story is absurd.
* "Ang ideya niya ay kakaiba." - His idea is absurd.
* "Hangal ka ba? Hindi naman mangyayari iyon!" - Are you absurd? That will never happen!
Ultimately, the best translation for "absurd" will depend on the specific context and the desired nuance.