A sailor's agreement or assent would be "aye."
Nodding your head often is a sign of assent in society
she had to assent to comming to school on time
She nodded in agreement to assent to their proposal.
Assent as a verb: Assenting to her demands, I did as she requested. Assent as a noun: When told they were going to see The Avengers, Jayne nodded her assent.
The homophone for "assent" is "ascent."
I assent to your demands, sir.
his assent was bad
The team is seeking your official assent, but we'll go without it.
A nodding assent refers to a gesture in which someone agrees or acknowledges something by moving their head up and down in a yes motion. It is a nonverbal way of expressing agreement or approval without needing to speak.
The child nodded in assent when asked if they wanted ice cream for dessert.
Dissent
agreement agreement