MOST CONSIDERATE is a term used to describe someone who is very thoughtful and considerate of others. The two crossword solutions for this term are NICEST (6 letters) and KINDLIEST (9 letters). NICEST is an adjective that means having or showing a kind and pleasant nature, while KINDLIEST is an adverb that means in a kind and considerate manner. Both words can be used to describe someone who is very considerate and thoughtful of others.