Formal:
* Suitable: This is a general term for something that is fitting or appropriate for a particular situation.
* Acceptable: This implies that something meets a standard or is considered satisfactory.
* Proper: This suggests that something conforms to established rules or customs.
* Pertinent: This emphasizes that something is relevant or directly related to the situation.
* Apposite: This indicates that something is very appropriate or exactly suitable.
Informal:
* Okay: This is a casual way of saying that something is acceptable.
* Fine: This is another informal way of saying that something is acceptable.
* Alright: This is similar to "okay" but can sometimes imply a slight degree of reluctance.
* Decent: This suggests that something is of reasonable quality or standard.
* Fit for purpose: This emphasizes that something fulfills its intended function.
More specific:
* Befitting: This emphasizes that something is worthy of the situation or person.
* Commendable: This implies that something is praiseworthy or deserving of approval.
* Expedient: This suggests that something is practical and convenient.
* Judicious: This implies that something is wise and well-considered.
* Prudent: This suggests that something is careful and cautious.
The best word to use will depend on the specific context and the desired level of formality.