General Ability:
* Capable
* Competent
* Skillful
* Qualified
* Efficient
* Effective
* Talented
* Apt
* Gifted
Physical Ability:
* Strong
* Fit
* Healthy
* Robust
Mental Ability:
* Intelligent
* Clever
* Smart
* Bright
* Sharp
Financial Ability:
* Solvent
* Affluent
* Wealthy
Ability to Influence:
* Powerful
* Influential
* Authoritative
Ability to Act:
* Available
* Free
* At liberty
* Ready
* Prepared
Example:
* "He is able to lift heavy weights." (Capable)
* "She is able to speak three languages." (Fluent)
* "The company is able to meet its financial obligations." (Solvent)
Choosing the most appropriate synonym depends on the specific meaning you want to convey.