The phrase "capacity for" is commonly used to express a person's ability or potential to do something. However, there are many other synonyms that can be used to convey a similar meaning. For example, "aptitude for" suggests a natural talent or inclination towards something. "Capability for" implies the ability to perform a task or handle a situation. "Potential for" indicates the possibility for growth or development. "Talent for" highlights a specific skill or ability. "Competence for" refers to the level of proficiency or expertise in a particular field. By using synonyms for "capacity for," writers and speakers can add variety and nuance to their language while still conveying the same idea.