The term 'IN FULL FLOWER' can be represented by two crossword solutions, ABLOOM (6 letters) and OPEN (4 letters). ABLOOM is an adjective that means to be in full bloom or to be in a state of flourishing. OPEN is an adjective that means not closed or blocked off. Together, the two words describe something that is in its most vibrant and flourishing state, with no obstacles blocking it from reaching its full potential.