Words to show skills and attributes.
To study and practice medicine there are several core value and attributes which students need. Outlining your skill sets is a good use of your word count. Consider using phrases which outline the qualities which make a rounded physician. Use adjectives and nouns to describe how you are a good communicator, have good practical skills, a scientific aptitude and an awareness of professionalism.
A great way to find keywords could be to use the MSC core values and attributes skills list. Moreover, try to include the 6Cs in your personal statement, these are sets of values that all health and social care staff are expected to have: courage, commitment, competence, compassion, care, communication.