A number of synonyms frequently used for the phrase "occurring every year" include "annual," "yearly," "perennial," "recurring," and "cyclic." Of these, "annual" and "yearly" are most commonly used in referring to events or phenomena that take place once a year, such as annual festivals or seasonal cycles. "Perennial" denotes something that returns year after year, often used to describe plants or recurring issues. "Recurring" suggests something that happens repeatedly, while "cyclic" implies repeated cycles or patterns. Other synonyms for this phrase may also include "seasonal," "periodic," or "regular." Ultimately, the synonym used will depend on the context and intended meaning of the text.