The slang word "geddit" is used to ask if someone understands a particular concept or idea. There are several synonyms for this word, which can be used in different contexts. For example, one could say "get it?" or "you following?" to check if the person is comprehending the topic. Another synonym is "catch my drift?" which is often used when explaining a complex idea. "On the same page?" is a common phrase used in business situations to verify that everyone has a shared understanding of a particular project or plan. Whatever the synonym used, the aim is to ensure that the person understands the information being presented to them.