SAY OK is an expression used to indicate agreement or acceptance. It is often used as a response to a request or suggestion. The crossword solutions AGREE, LET, and ASSENT all have similar meanings and can be used to express the same sentiment. AGREE is a five-letter word meaning to accept or concur with a proposal or opinion. LET is a three-letter word meaning to allow or permit something to happen. ASSENT is a six-letter word meaning to AGREE to or approve of something. All three words can be used to express the sentiment of SAY OK.