Go-Aheads are expressions of approval or permission. Yesses (6 letters) is a plural form of yes, which is an affirmative answer to a question or request. OKAYS (5 letters) is another way of saying yes, and NODS (4 letters) is a gesture of agreement or acceptance. Eses (4 letters) is a slang term for yes, and ASSENTS (7 letters) is a formal agreement or consent. YESES (5 letters) is another plural form of yes, and Oks (3 letters) is a shortened version of okay. All of these terms can be used as go-aheads.