CRUCIAL' (7 letters) The two crossword solutions for the term of vital importance are 'PIVOTAL' and 'CRUCIAL'. PIVOTAL is an adjective meaning of great importance or influence, especially in the development or success of something. CRUCIAL is also an adjective meaning of the utmost importance; decisive or critical. Both words can be used to describe something that is of vital importance, as they both imply a sense of urgency and significance.