The phrase "right stuff" is often used to describe someone who has the necessary qualities to succeed in a particular field or activity. Synonyms for this term include "competence," "expertise," "mastery," and "proficiency." Other synonyms for the phrase "right stuff" might include "aptitude," "ability," "talent," and "skill." In addition, words like "credentials," "qualifications," and "experience" could also be considered synonyms, as they all suggest that someone has the necessary background or training to excel in a given area. At the end of the day, the most important thing is to have confidence in one's own abilities and to be willing to work hard to achieve success.