The term 'agreeable word' can be broken down into four crossword solutions: YES (3 letters), LETS (4 letters), YESSES (6 letters), and YESES (5 letters). YES is an affirmative answer, usually used to express agreement or acceptance. LETS is a contraction of the phrase 'let us, ' which is used to suggest that two or more people should do something together. YESSES is the plural form of YES, and YESES is the present tense form of YES. All four words are used to express agreement or acceptance in different contexts.