Adjectives:
* Capable: "He is capable able to handle the pressure."
* Incapable: "She is incapable able to lift that heavy box."
* Notable: "The team's performance was notable able to earn them the championship."
* Reasonable: "It's reasonable able to expect some delays during rush hour."
* Unreasonable: "His demands were unreasonable able to be met."
Verbs:
* Be: "I am able to help you with that."
* Become: "She became able to speak fluent Spanish after living in Mexico for a year."
* Make: "We made ourselves able to finish the project on time."
Other words:
* Highly: "He is highly able to succeed in his career."
* More: "The new system is more able to handle large amounts of data."
* Less: "The company is less able to compete in the market now."
It's important to consider the specific meaning you want to convey when choosing a word to go before "able."