You can use it to describe:
* Things: "This is a suitable dress for the occasion."
* People: "He's a suitable candidate for the job."
* Actions: "That was a suitable response to the question."
Examples of how to use "suitable" in a sentence:
* "The restaurant was suitable for a large group."
* "She chose a suitable outfit for the interview."
* "The weather was not suitable for a picnic."
* "The company's response was not suitable to the customer's complaint."
If you are asking for synonyms for "suitable," here are a few:
* Appropriate
* Fit
* Proper
* Apt
* Relevant
* Acceptable
* Adequate
* Satisfactory
The best synonym for "suitable" will depend on the context of your sentence.