The term 'First in Importance' can be expressed in three different ways: PRIMARY (7 letters), PREMIER (7 letters), and ALPHA (5 letters). PRIMARY means the most important or most essential, while PREMIER is the highest in rank or quality. ALPHA is the first letter of the Greek alphabet and is often used to refer to something that is the first or most important. All three words are used to describe something that is the most important or the first in importance.