The term 'not behind' can be described by the following crossword solutions: ANTI (4 letters), AHEAD (5 letters), AGAINST (7 letters), Uptodate (8 letters), and Inthelead (9 letters). ANTI means opposed to or AGAINST, AHEAD means in front or in advance of others, AGAINST means in opposition to, Uptodate means current or modern, and Inthelead means leading or AHEAD of the rest. Therefore, the term 'not behind' can be interpreted as being opposed to, in front of, or AGAINST others, current or modern, and leading or AHEAD of the rest.