Word of Gratitude is an expression of appreciation and recognition for a kindness or favor. It is often expressed through words such as 'thank you' or 'I'm grateful'. The term can also be used to describe a gesture of gratitude, such as a hug or a smile. The crossword solution for the term Word of Gratitude is 'THANKS', which is a six-letter word. This is an appropriate response to show appreciation for someone's kindness or favor.