Okeydokey is an informal word used to show agreement or acceptance of something. Some synonyms for this word include "okay," "alright," "sure," "yes," "absolutely," "no problem," "agreed," "fine," "good," "affirmative," "roger," "aye," "very well," "certainly," "you bet," "indeed," and "right on." These synonyms can be used interchangeably with okeydokey in various contexts to express affirmation. However, each word has its unique connotation and tone, thus choosing the appropriate synonym can add more depth and emphasis to the communication.