The term 'agreeable response' can be represented by four different crossword solutions: SURE (4 letters), LETS (4 letters), YES (3 letters), and ECHO (4 letters). All of these words are affirmative responses that indicate agreement with a statement or request. SURE is an informal way of saying YES, while LETS is a more casual way of suggesting that two or more people should do something together. YES is the most direct and straightforward way of expressing agreement, while ECHO is a less common way of saying YES, as it implies that the speaker is repeating what was said.