General Challenge:
* Hamon (pronounced "ha-mon") - This is the most common and general term for a challenge.
* Pagsubok (pronounced "pa-gso-bok") - This means "test" or "trial" and can also be used for a challenge, especially a difficult one.
Challenge to a fight or competition:
* Hamon (pronounced "ha-mon") - This can also be used for a challenge to fight or compete.
* Paglaban (pronounced "pag-la-ban") - This means "fight" or "competition" and can be used for a challenge to fight or compete.
Challenge to something difficult:
* Pagsubok (pronounced "pa-gso-bok") - This word is best used for a challenging situation or task.
* Paghihirap (pronounced "pag-hi-hi-rap") - This means "difficulty" and can be used for a challenge that requires effort or hardship.
The best word to use depends on the specific context of the challenge.