The term 'furthermost' is an adjective meaning the most DISTANT or EXTREME. It can be used to describe physical distance, as well as figurative distance such as time or degree. The crossword solutions for furthermost are 'FARTHEST' (8 letters), 'DISTANT' (7 letters), 'ULTIMATE' (8 letters), and 'EXTREME' (7 letters). All of these words have similar meanings, but each has its own nuances. FARTHEST implies the greatest physical distance, while DISTANT implies a lesser physical distance. ULTIMATE implies the highest degree or most EXTREME, while EXTREME implies a lesser degree or less EXTREME.