Endenizen is not a very common word and therefore, finding synonyms for it can be tricky. But, some alternatives that can be used are "resident", "inhabitant", "citizen", "denizen", "occupant" or "dweller". These are words that can be used in the context of someone or something that lives, exists, or has a connection with a particular place. When used in a sentence, it can help add variation and avoid repetitive use of one word. It's always good to have a range of synonyms in your arsenal to make your writing more interesting and engaging.