The crossword solutions for the term 'THAT'S THE TRUTH' are FACT (4 letters), AMEN (4 letters), HONEST (6 letters), NOLIE (5 letters), ILLSAY (6 letters), ISWEAR (6 letters), and ISITEVER (8 letters). These words all refer to expressions of truthfulness, with FACT referring to a statement THAT is true, AMEN being a word used to express agreement or acceptance, HONEST referring to someone who is truthful, NOLIE meaning to not lie, ILLSAY being an expression of truthfulness, ISWEAR meaning to swear to tell the truth, and ISITEVER being an expression of certainty. Together, these words form the phrase 'THAT's the truth, ' which is used to emphasize the truthfulness of a statement.