Expressing a thought is an important part of communication. It involves expressing one's opinion or point of view on a particular subject. The two crossword solutions for the term 'express a thought' are OPINE (5 letters) and OPINIONATE (10 letters). OPINE is a verb meaning to express an opinion or belief, while OPINIONATE is an adjective meaning to express opinions in a forceful or confident manner. Both words can be used to describe someone who expresses their thoughts in a clear and confident way.