Indeedy is an informal adverb that means "indeed" or "certainly." It's often used to express agreement or confirmation. There are several synonyms for the word indeed, including certainly, absolutely, positively, unquestionably, and undoubtedly, all of which indicate that something is true or accurate. Another equivalent term is "You can say that again," which signals agreement and reinforces a previous statement. Additionally, "Absolutely right," "No doubt about it," and "Without a doubt" are other plausible synonyms for the word indeedy. These phrases can be used in the same context or situation as indeedy and provide variety and nuance to the conversation.