The term U.S. Coin Word is composed of two crossword solutions, UNUM (4 letters) and TRUST (5 letters). UNUM is a Latin word meaning one, and is the motto of the United States, appearing on all U.S. coins since 1795. TRUST is a word that implies faith and confidence in someone or something, and is also featured on many U.S. coins. Together, these two words form the phrase U.S. Coin Word, which is a reminder of the importance of unity and TRUST in the United States.