Yeppers is an informal term commonly used to show agreement or affirmation. While it is colloquial and may not be suitable for all situations, there are various synonyms that can convey a similar meaning. One of the alternatives could be "absolutely", a more formal expression that signifies agreement or confirmation. Another synonym could be "indeed", which carries a similar connotation. Additionally, "certainly" serves as an appropriate substitute, indicating a definite agreement with what has been stated. For a more enthusiastic response, "definitely" can be used. These synonyms offer diverse options to replace the term "yeppers" depending on the context or desired level of formality.